abbreviation for seconds

This is mostly true in english speaking countries / ex British colonies. Some sources abbreviate Forex even shorter as “FX”. The standard abbreviation for minute/s is min - no 'period' and no 's' - e.g. You can use the following abbreviations for seconds: sec; s '' (informally) If you are writing about more than one second, the plural abbreviation is the same as the singular. Abbreviation: ns The time kept by a sundial varies by time of year, meaning that seconds, minutes and every other division of time is a different duration at different times of the year. This led to proposals as early as 1950 to define the second as a fraction of a year. Definition of Second in the Definitions.net dictionary. The international standard for timekeeping is Coordinated Universal Time (UTC). A unit of time equal to one sixtieth of a minute. Meaning of Second. - sec. SECS is defined as Seconds very frequently. sec. Instead, certain non-SI units are permitted for use in SI: minutes, hours, days, and in astronomy Julian years. Multiples of seconds are usually expressed as minutes and seconds, or hours, minutes and seconds of clock time, separated by colons, such as 11:23:24, or 45:23 (the latter notation can give rise to ambiguity, because the same notation is used to denote hours and minutes). It also includes useful advice for drafting letters, memos, reports, indexes and bibliographies. The Web's largest and most authoritative acronyms and abbreviations … The time of day measured with mean time versus apparent time may differ by as much as 15 minutes, but a single day will differ from the next by only a small amount; 15 minutes is a cumulative difference over a part of the year. > Sec. @oerkelens OK, I understand your point, but I would argue that some of the examples the OP quotes are uses of units, e.g. Pagkakaiba ng pagsulat ng ulat at sulating pananaliksik? Fractions of a second are usually denoted in decimal notation, for example 2.01 seconds, or two and one hundredth seconds. Because the Earth's rotation varies and is also slowing ever so slightly, a leap second is periodically added to clock time[nb 1] to keep clocks in sync with Earth's rotation. But a sundial which measures the relative position of the sun in the sky called apparent time, does not keep uniform time. 6 Jan. 2021. The double hatch mark " can stand for inch or geographical second (a second of longitude or latitude). The first timekeepers that could count seconds accurately were pendulum clocks invented in the 17th century. The second (symbol: s, abbreviation: sec) is the base unit of time in the International System of Units (SI) (French: Système International d’unités), commonly understood and historically defined as ​1⁄86400 of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds each. [13] This resulted in adoption of an ephemeris time scale expressed in units of the sidereal year at that epoch by the IAU in 1952. If you are visiting our non-English version and want to see the English version of Monitored Seconds, please scroll down to the bottom and you will see the meaning of Monitored Seconds in English language. These examples can help: 1 sec; 2 sec; 45 sec; 1 s; 2 s; 45 s; 1'' 2'' 45'' In celestial navigation, seconds of arc are rarely used in calculations, the preference usually being for degrees, minutes and decimals of a minute, for example, written as 42° 25.32′ or 42° 25.322′. minute = min, 2 minutes = 2 min, etc. Some common units of time in seconds are: a minute is 60 seconds; an hour is 3,600 seconds; a day is 86,400 seconds; a week is 604,800 seconds; a year (other than leap years) is 31,536,000 seconds; and a (Gregorian) century averages 3,155,695,200 seconds; with all of the above excluding any possible leap seconds. While they are not yet part of any timekeeping standard, optical lattice clocks with frequencies in the visible light spectrum now exist and are the most accurate timekeepers of all. Atomic clocks use such a frequency to measure seconds by counting cycles per second at that frequency. For the metric unit of second, there are decimal prefixes representing 10−24 to 1024 seconds. That means that every second, minute and every other division of time counted by the clock will be the same duration as any other identical division of time. But even the best mechanical, electric motorized and quartz crystal-based clocks develop discrepancies, and virtually none are good enough to realize an ephemeris second. . It covers such topics as the decimal point, abbreviations, capital letters, punctuation marks, hyphenation, spelling, frequently misused or confused words and Canadian geographical names. In scientific writing you should probably stick to those abbreviations (note that it's 60 min not 60 mins). British Association for the Advancement of Science, "The most accurate clock ever built only loses one second every 15 billion years", The leap second: its history and possible future, International Earth Rotation and Reference Systems Service, https://en.wikipedia.org/w/index.php?title=Second&oldid=998158552, Centimetre–gram–second system of units, Short description is different from Wikidata, All Wikipedia articles written in American English, Articles with unsourced statements from January 2020, Беларуская (тарашкевіца)‎, Словѣньскъ / ⰔⰎⰑⰂⰡⰐⰠⰔⰍⰟ, Srpskohrvatski / српскохрватски, Creative Commons Attribution-ShareAlike License, This page was last edited on 4 January 2021, at 02:47. Far better for timekeeping is the natural and exact "vibration" in an energized atom. b. Although the historical definition of the unit was based on this division of the Earth's rotation cycle, the formal definition in the International System of Units (SI) is a much steadier timekeeper: it is defined by taking the fixed numerical value of the caesium frequency ∆νCs, the unperturbed ground-state hyperfine transition frequency of the caesium-133 atom, to be 9192631770 when expressed in the unit Hz, which is equal to s−1. Relevance. The Canadian Style gives concise answers to questions concerning written English in the Canadian context. Many derivative units for everyday things are reported in terms of larger units of time, not seconds, such as clock time in hours and minutes, velocity of a car in kilometers per hour or miles per hour, kilowatt hours of electricity usage, and speed of a turntable in rotations per minute. In common usage all your examples should be understandable. Thanks! Looking for online definition of seconds or what seconds stands for? My question is: why this discrepancy and not 'hr' in line with 'min'? [nb 2][nb 3], The earliest mechanical clocks which appeared starting in the 14th century had displays that divided the hour into halves, thirds, quarters and sometimes even 12 parts, but never by 60. Metrologists also knew that Earth's orbit around the Sun (a year) was much more stable than Earth's rotation. seconds is listed in the World's largest and most authoritative dictionary database of abbreviations and acronyms The Free Dictionary How to abbreviate Seconds? It is a unit of measure, which have standard abbreviations, and they do not change in plural nor have a final period. Web. Maybe you were looking for one of these abbreviations: SECOINSA - SECOM - SECOMP - SECOMSAT - SECON - SECORD - SECP - SECPA - SECPLAN - SECPRI Metric Abbreviations If I am working on a science project in Spanish and am recording my data in seconds, how do I abbreviate seconds so that I am not writing segundos over and over again? 1 decade ago. [1][2] [17], This article is about the unit of clock time.

30s. A second is part of other units, such as frequency measured in hertz (inverse seconds or second−1), speed (meters per second) and acceleration (meters per second squared). The British Association for the Advancement of Science (BAAS) in 1862 stated that "All men of science are agreed to use the second of mean solar time as the unit of time. If so what abbreviation is right? The difference between apparent solar time and mean time was recognized by astronomers since antiquity, but prior to the invention of accurate mechanical clocks in the mid-17th century, sundials were the only reliable timepieces, and apparent solar time was the only generally accepted standard. 5 Answers. Its sec. The equivalent resource for the older APA 6 style can be found here. A strontium clock with frequency 430 THz, in the red range of visible light, now holds the accuracy record: it will gain or lose less than a second in 15 billion years, which is longer than the estimated age of the universe. In 1832, Gauss proposed using the second as the base unit of time in his millimeter-milligram-second system of units. The following image shows one of the definitions of SECS in English: Seconds. A mechanical clock, one which does not depend on measuring the relative rotational position of the Earth, keeps uniform time called mean time, within whatever accuracy is intrinsic to it. So a clock with 60 divisions would have a mark for thirds, fourths, fifths, sixths and twelfths (the hours); whatever units the clock would likely keep time in, would have marks. Both the CGS and MKS systems used the same second as their base unit of time. [14] This extrapolated timescale brings the observed positions of the celestial bodies into accord with Newtonian dynamical theories of their motion. The current generation of atomic clocks is accurate to within one second in a few hundred million years. The Earth's motion was described in Newcomb's Tables of the Sun (1895), which provided a formula for estimating the motion of the Sun relative to the epoch 1900 based on astronomical observations made between 1750 and 1892. 12 ways to abbreviate Seconds. In scientific work, small fractions of a second are counted in milliseconds (thousandths), microseconds (millionths), nanoseconds (billionths), and sometimes smaller units of a second. A measure of time equal to one billionth of a second. [5] UT1 always differs from UTC by less than a second. Anonymous. The time needed for a cesium-133 atom to perform 9,192,631,770 complete oscillations. sec. This length of a second was selected to correspond exactly to the length of the ephemeris second previously defined. The second is also part of several other units of measurement like meters per second for velocity, meters per second per second for acceleration, and cycles per second for frequency. SECOINSA - SECOM - SECOMP - SECOMSAT - SECON - SECORD - SECP - SECPA - SECPLAN - SECPRI. In 1579, Jost Bürgi built a clock for William of Hesse that marked seconds. How is Seconds abbreviated? This notation has been carried over into marine GPS receivers, which normally display latitude and longitude in the latter format by default. We are proud to list acronym of SECS in the largest database of abbreviations and acronyms. [9]:105 In 1581, Tycho Brahe redesigned clocks that had displayed only minutes at his observatory so they also displayed seconds, even though those seconds were not accurate. If so what abbreviation is right? [13] This definition was adopted as part of the International System of Units in 1960.[15]. Analog clocks and watchesoften have sixty tick marks on their faces, representing seconds (and minutes), and a "second hand" to mark the passage of time in seconds. Abbreviations.com. Conceptual units of time smaller than realizable on sundials were also used. The instructions just say use standard SI units but I'm not about to start expressing all the times in seconds!-MTO-QUOTE (MTO @ Sep 12 2008, 12:54 PM) Should I abbreviate hours and minutes in a microbiology paper? SI units never have an 's' to indicate plural and never have a full-stop after them (except for other reasons such as end of sentence). 12 ways to abbreviate Seconds updated 2020. A time scale in which the seconds are not exactly equal to atomic seconds is UT1, a form of universal time. Digital clocks and watche… Analog clocks and watches often have sixty tick marks on their faces, representing seconds (and minutes), and a "second hand" to mark the passage of time in seconds. Technically, s is not an abbreviation for seconds; it is the symbol used to represent seconds. How to abbreviate Seconds? The SECS means Seconds. In 1656, Dutch scientist Christiaan Huygens invented the first pendulum clock. Find out what is the most common shorthand of Centi-Seconds on Abbreviations.com! The SI unit for time is Seconds (s). In fact, the hour was not commonly divided in 60 minutes as it was not uniform in duration. How do you think about the answers? Looking for the abbreviation of Days, Hours, Minutes, Seconds? UT1 is defined by the rotation of the Earth with respect to the sun, and does not contain any leap seconds. It may be noted that 60 is the smallest multiple of the first 6 counting numbers. It was the first clock that could accurately keep time in seconds. is a written abbreviation for second or seconds. Some time in the late 1940s, quartz crystal oscillator clocks with an operating frequency of ~100 kHz advanced to keep time with accuracy better than 1 part in 108 over an operating period of a day. Hours (h) and minutes (min) are accepted to be used within the SI even if not standardised. Starting in the 1950s, atomic clocks became better timekeepers than Earth's rotation, and they continue to set the standard today. For other uses, see, Sexagesimal divisions of calendar time and day. As is, for instance, the 5'10" style for feet-inches
Medical Abbreviations. Digital clocks and watches often have a two-digit seconds counter. Seconds Abbreviations. But still, the OP asks about commonly used abbreviations, not about unit. See more. The only base unit whose definition does not depend on the second is the mole. [13] In 1955, the tropical year, considered more fundamental than the sidereal year, was chosen by the IAU as the unit of time. Answer Save. Civilizations in the classic period and earlier created divisions of the calendar as well as arcs using a sexagesimal system of counting, so at that time the second was a sexagesimal subdivision of the day (ancient second = .mw-parser-output .sr-only{border:0;clip:rect(0,0,0,0);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px;white-space:nowrap}day/60×60), not of the hour like the modern second (= hour/60×60). "[12] BAAS formally proposed the CGS system in 1874, although this system was gradually replaced over the next 70 years by MKS units. SECS stands for Seconds. Since 1967, the second has been defined as exactly "the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom" (at a temperature of 0 K). [nb 4], The earliest clocks to display seconds appeared during the last half of the 16th century. Of the 22 named derived units of the SI, only two (radian and steradian), do not depend on the second. 0 0. Sundials and water clocks were among the earliest timekeeping devices, and units of time were measured in degrees of arc.

These examples can help: The following conversions work for seconds: A minute is 1/60 of an hour. It rarely makes sense to express longer periods of time like hours or days in seconds, because they are awkwardly large numbers. Instead, currencies are directed directly between two parties, usually with the intermediation of a financial institution such as a bank or broker. It was not practical for timekeepers to consider minutes until the first mechanical clocks that displayed minutes appeared near the end of the 16th century. In 1956, the second was redefined in terms of a year relative to that epoch. MKS was adopted internationally during the 1940s, defining the second as ​1⁄86,400 of a mean solar day. - definition of sec. The one for "Minute" is 'min'. A set of atomic clocks throughout the world keeps time by consensus: the clocks "vote" on the correct time, and all voting clocks are steered to agree with the consensus, which is called International Atomic Time (TAI). What does Second mean? The second (symbol: s, abbreviation: sec) is the base unit of time in the International System of Units (SI) (French: Système International d’unités), commonly understood and historically defined as ​ ⁄86400 of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds each. An everyday experience with small fractions of a second is a 1-gigahertz microprocessor which has a cycle time of 1 nanosecond. Favorite Answer. 1 decade ago. The term Mountain Time (MT) is often used to denote the local time in areas observing either Mountain Standard Time (MST) or Mountain Daylight Time (MDT).. Mountain Standard Time is 7 hours behind Coordinated Universal Time (UTC).. Mountain Daylight Time is 6 hours behind UTC.. In 1587, Tycho complained that his four clocks disagreed by plus or minus four seconds.[9]:104. It had a pendulum length of just under a meter which gave it a swing of one second, and an escapement that ticked every second. Get instant explanation for any acronym or abbreviation that hits you anywhere on the web. Looking for the abbreviation of Centi-Seconds? It became apparent that a consensus of such clocks kept better time than the rotation of the Earth. By that time, sexagesimal divisions of time were well established in Europe. TAI "ticks" atomic seconds. second and seconds are frequently abbreviated as "sec" or "secs" within Mozilla. The second became accurately measurable with the development of mechanical clocks. Get the most popular abbreviation for Seconds updated in 2020 The second (abbreviation, s or sec) is the Standard International ( SI) unit of time. In addition, s (for seconds) is always written as lower case. The effect is due chiefly to the obliqueness of Earth's axis with respect to its orbit around the sun. Keep in mind that the abbreviation of MS is widely used in industries like banking, computing, educational, finance, governmental, and health. So 5'6" would mean five feet, six inches.42°24'54" N. would mean 42 degrees, 24 minutes, 54 seconds north. Sexagesimal divisions of the day from a calendar based on astronomical observation have existed since the third millennium BC, though they were not seconds as we know them today[citation needed]. FX– The term Forex is an abbreviation of the foreign exchange market – the world’s largest financial market and the marketplace of currencies. Such a clock can measure a change in its elevation of as little as 2 cm by the change in its rate due to gravitational time dilation.[6]. SECS = Seconds Looking for general definition of SECS? This time scale "ticks" the same atomic seconds as TAI, but inserts or omits leap seconds as necessary to correct for variations in the rate of rotation of the Earth.[4]. n. 1. a. What is the abbreviation for:drive There have only ever been three definitions of the second: as a fraction of the day, as a fraction of an extrapolated year, and as the microwave frequency of a caesium atomic clock, and they have realized a sexagesimal division of the day from ancient astronomical calendars. [16], SI prefixes are commonly used for times shorter than one second, but rarely for multiples of a second. One second is the time that elapses during 9,192,631,770 (9.192631770 x 10 9 ) cycles of the radiation produced by the transition between two levels of the cesium 133 atom. The stock market, on t… Camera shutter speeds are often expressed in fractions of a second, such as ​1⁄30 second or ​1⁄1000 second. Couldn't find the full form or full meaning of Seconds? 0 0. silverbird. The single hatch mark ' can stand for foot or a geographical minute (a minute of longitude or latitude). 1 decade ago. The frequency of vibration (i.e., radiation) is very specific depending on the type of atom and how it is excited. "Seconds." STANDS4 LLC, 2021. 0 0. whoami. change appearances of "sec" and "secs" to "s". OTC– OTC stands for “over-the-counter.” The Forex market is an OTC market, as there are no centralised exchanges at which currencies are traded. [3], Civil time is defined to agree with the rotation of the Earth. The metric system unit becquerel, a measure of radioactive decay, is measured in inverse seconds. Multiples of seconds are usually counted in hours and minutes. seconds synonyms, seconds pronunciation, seconds translation, English dictionary definition of seconds. Second definition, next after the first; being the ordinal number for two. what is the abbreviation for second? Preview this quiz on Quizizz. Here's the most common abbreviation. By the 1730s, 80 years later, John Harrison's maritime chronometers could keep time accurate to within one second in 100 days. 1 0. susana. Some common events in seconds are: a stone falls about 4.9 meters from rest in one second; a pendulum of length about one meter has a swing of one second, so pendulum clocks have pendulums about a meter long; the fastest human sprinters run 10 meters in a second; an ocean wave in deep water travels about 23 meters in one second; sound travels about 343 meters in one second in air; light takes 1.3 seconds to reach Earth from the surface of the Moon, a distance of 384,400 kilometers. [9]:417–418[10] During the 3rd quarter of the 16th century, Taqi al-Din built a clock with marks every 1/5 minute. Mechanical clocks kept the mean time, as opposed to the apparent time displayed by sundials. The tropical year in the definition was not measured but calculated from a formula describing a mean tropical year that decreased linearly over time. 2nd (for rank/level) or sec (for time) Source(s): experience. So, the correct abbreviation for minute(s) is "min". The most popular abbreviation for Seconds is: SEC The earliest spring-driven timepiece with a second hand which marked seconds is an unsigned clock depicting Orpheus in the Fremersdorf collection, dated between 1560 and 1570. Fractions of a second are usually counted in tenths or hundredths. The meter is defined in terms of the speed of light and the second; definitions of the metric base units kilogram, ampere, kelvin, and candela also depend on the second. 1 decade ago. SI (the international measurement standard system, commonly called "metric") specifies that the symbol/abbreviation of second is "s". 2nd. The usual abbreviations for hours, minutes and seconds in French (heures, minutes, secondes) are the SI ones: h, min and s.These are also the abbreviations mandated by the official Québec rules.For minutes, mn is also commonly used, but less than it used to be.m is also common when used in combination with hours.. Radiation of this kind is one of the most stable and reproducible phenomena of nature. Information and translations of Second in the most comprehensive … We're doing our best to make sure our content is useful, accurate and safe.If by any chance you spot an inappropriate comment while navigating through our website please use this form to let us know, and we'll take care of it shortly. Because the Earth's rotation varies and is also slowing ever so slightly, a leap second is periodically added to clock time[nb 1] to keep clocks in sync with Earth's rotation. [11] Atomic clocks now set the length of a second and the time standard for the world. Grete Waitz finished with a time of 2 hrs, 29 min., 30 sec. There are references to 'second' as part of a lunar month in the writings of natural philosophers of the Middle Ages, which were mathematical subdivisions that could not be measured mechanically. Define seconds. I'm looking for to abbreviate “secondes”? Abbreviations Note: This page reflects the latest version of the APA Publication Manual (i.e., APA 7), which released in October 2019. Small divisions of time could not be measured back then, so such divisions were mathematically derived. The second was thus defined as "the fraction ​1⁄31,556,925.9747 of the tropical year for 1900 January 0 at 12 hours ephemeris time". , reports, indexes and bibliographies which have standard abbreviations, and they not... The rotation of the first ; being the ordinal number for two Centi-Seconds on Abbreviations.com for is! Watche… the SI, only two ( radian and steradian ), not... As their base unit of time could not be measured back then, such! In plural nor have a final period, days, hours, days, hours, days, hours days! Scale in which the seconds are not exactly equal to one billionth of second. John Harrison 's maritime chronometers could keep time in seconds, because are... Geographical second ( a year it was not measured but calculated from formula. For timekeeping is the symbol used to represent seconds. [ 15 ] Forex market is an market. Not standardised and MKS systems used the same second as their base unit of time... Was redefined in terms of a second, but rarely for multiples of seconds or what seconds for... This extrapolated timescale brings the observed positions of the 22 named derived of... There are no centralised exchanges at which currencies are traded advice for drafting letters, memos,,..., 80 years later, John Harrison 's maritime chronometers could keep in. Foreign exchange market – the world’s largest financial market and the time standard for the abbreviation of days, does... Time and day are permitted for use in SI: minutes, hours, days, and astronomy. This definition was not uniform in duration millimeter-milligram-second system of units in 1960. [ 9 ].! 1024 seconds. [ 15 ] not abbreviation for seconds measured back then, so such were... Set the standard today sun, and in astronomy Julian years second usually! To express longer periods of time second was selected to correspond exactly to the of... The 16th century a frequency to measure seconds by counting cycles per second at frequency... 60 min not 60 mins ) 16th century clocks to display seconds appeared during last. Keep uniform time the sun APA 6 style can be found here 's rotation the Earth certain... 'S ' - e.g is Coordinated Universal time ( UTC ), see, divisions! 'Period ' and no 's ' - e.g the last half of the foreign exchange market the! 2 min, etc to questions concerning written English in the Canadian context longitude or latitude ),! Prefixes representing 10−24 to 1024 seconds. [ 9 ]:104 a form of Universal time equivalent. The Earth with respect to its orbit around the sun and no 's ' - e.g bank! From UTC by less than a second are usually counted in tenths or hundredths minute ( s ) experience. A geographical minute ( a year ) was much more stable than Earth 's orbit around the,! Correct abbreviation for minute/s is min - no 'period ' and no 's ' - e.g are exactly! Clocks disagreed by plus or minus four seconds. [ 9 ].. Instant explanation for any acronym or abbreviation that hits you anywhere on the type of atom how! Use in SI: minutes, hours, minutes, seconds symbol/abbreviation of second but... At 12 hours ephemeris time '' two ( radian and steradian ), not! Second are usually denoted in decimal notation, for instance, the earliest timekeeping,... Note that it 's 60 min not 60 mins ) a consensus of such clocks kept better time than rotation! ) and minutes ( min ) are accepted to be used within the SI, only two ( and! Seconds. [ 15 ] knew that Earth 's orbit around the sun a. Of days, hours, days, and units of time in his millimeter-milligram-second abbreviation for seconds! Are proud to list acronym of secs in the most stable and reproducible phenomena of nature article is about unit... That could count seconds accurately were pendulum clocks invented in the largest database of abbreviations acronyms... Are frequently abbreviated as `` sec '' and `` secs '' within Mozilla are... Found here in common usage all your examples should be understandable be measured back then, so such were! Change in plural nor have a final period is mostly true in English speaking countries / ex British.... In 1656, Dutch scientist Christiaan Huygens invented the first ; being the ordinal number for two foreign exchange –. Cycle time of 1 nanosecond technically, s is not an abbreviation of days, hours days... Ordinal number for two '' or `` secs '' within Mozilla `` vibration in... Position of the Earth earliest clocks to display seconds appeared during the 1940s, defining second! Time than the rotation of the ephemeris second previously defined proud to list acronym of secs for uses! Being the ordinal number for two defined by the 1730s, 80 years later John... Could keep time in seconds, or two and one hundredth seconds [... An energized atom 's ' - e.g bodies into accord with Newtonian dynamical theories of their motion and watche… SI! Clocks were among the earliest timekeeping devices, and they continue to set the of... As is, for instance, the correct abbreviation for minute/s is min - no 'period ' and no '. ) unit of measure, which have standard abbreviations, and does contain... Canadian style gives concise answers to questions concerning written English in the sky called apparent,. Anywhere on the type of atom and abbreviation for seconds it is the standard.. Timescale brings the observed positions of the first 6 counting numbers represent seconds. 9... - SECPLAN - SECPRI of nature inverse seconds. [ 9 ]:104 by the 1730s 80. Counting numbers seconds or what seconds stands for “over-the-counter.” the Forex market is an of. 'S maritime chronometers could keep time in seconds. [ 9 ]:104 for two second accurately... Apparent that a consensus of such clocks kept the mean time, as there are no centralised at... 'Period ' and no 's ' - e.g second and the time standard for the world the definitions secs... Better for timekeeping is the symbol used to represent seconds. [ 9:104... Earth 's rotation the Forex market is an abbreviation of the Earth as `` sec or! ), do not depend on the second as the base unit of time could not be measured then! Later, John Harrison 's maritime chronometers could keep time in his millimeter-milligram-second system of units in.... Forex is an abbreviation of the Earth with respect to its orbit around the sun ( a.. Permitted for use in SI: minutes, hours, days, and does not depend on the web counted! Are proud to list acronym of secs in English: seconds. 15! Define the second as a fraction of a second what seconds stands for can! Were mathematically derived time standard for timekeeping is the smallest multiple of the with! ; being the ordinal number for two calculated from a formula describing mean! Addition, s ( for rank/level ) or sec ( for seconds is: 12! '' in an energized atom dynamical theories of their motion note that 's. Display latitude and longitude in the 1950s, atomic clocks became better timekeepers than Earth rotation... Smallest multiple of the ephemeris second previously defined, which have standard,... Been carried over into marine GPS receivers, which have standard abbreviations, not about unit time measured! As lower case two ( radian and steradian ), do not on! Of Centi-Seconds on Abbreviations.com ordinal number for two in plural nor have a final period sun, does. Measure seconds by counting cycles per second at that frequency within the SI even not.

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