Second Wiki - What is the second?

The second is the SI base unit of time, 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. Mechanical and electric clocks and watches usually have a face with 60 tickmarks representing seconds and minutes, traversed by a second hand and minute hand. Digital clocks and watches often have a two-digit counter that cycles through seconds. 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 per second for frequency. 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: 1 second is defined to be 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). Because the Earth's rotation varies and is also slowing ever so slightly, a leap second is periodically added to clock time to keep clocks in sync with Earth's rotation. Multiples of seconds are usually counted in hours and minutes. Fractions of a second are usually counted in tenths or hundredths. In scientific work, small fractions of a second are counted in milliseconds (thousandths), microseconds (millionths), nanoseconds (billionths), and sometimes smaller units of a second. An everyday experience with small fractions of a second is a 1-gigahertz microprocessor which has a cycle time of 1 nanosecond. Camera shutter speeds usually range from ​1⁄60 second to ​1⁄250 second. 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. Small divisions of time could not be counted back then, so such divisions were figurative. The first timekeepers that could count seconds accurately were pendulum clocks invented in the 17th century. Starting in the 1950s, atomic clocks became better timekeepers than earth's rotation, and they continue to set the standard today..

What does the word second mean? Find synonyms, antonyms and the meaning of the word second in our free online dictionary! Find words starting with second and anagrams of second.

Definitions of "second"

  • A unit of time equal to one sixtieth of a minute. noun
  • The time needed for a cesium-133 atom to perform 9,192,631,770 complete oscillations. See Table at measurement. noun
  • A brief interval of time; a moment. See Synonyms at moment. noun
  • Mathematics A unit of angular measure equal to one sixtieth of a minute. noun
  • Coming next after the first in order, place, rank, time, or quality. adjective
  • Repeating an initial instance: a second chance. adjective
  • Reminiscent of one that is well known: a second George Washington; a second Waterloo. adjective
  • Alternate; other: every second year. adjective
  • Inferior to another; subordinate: second vice president at the bank; a leader second to none. adjective
  • Music Having a lower pitch. adjective
  • Music Singing or playing a part having a lower range. adjective
  • Having the second-highest ratio. Used of gears in a sequence. adjective
  • The ordinal number matching the number 2 in a series. noun
  • One of two equal parts. noun
  • One that is next in order, place, time, or quality after the first. noun
  • An article of merchandise of inferior quality. Often used in the plural. noun
  • The official attendant of a contestant in a duel or boxing match. See Synonyms at assistant. noun
  • Music The interval between consecutive tones on the diatonic scale. noun
  • Music A tone separated by this interval from another tone. noun

The word "second" in example sentences

The _first two glumes_ are membranous, ovate-oblong, glabrous, acuminate and shortly awned, the _first glume_ is shorter than the second, 1 - to 3-nerved, the _second glume_ is longer than the first,. [A Handbook of Some South Indian Grasses]

And so with all other brave and rightly-trained men; their work is first, their fee second -- very important always, but still _second_.. [The Ontario Readers: Fourth Book]

To prepare the ribs for sale, they are usually cut into pieces that contain two ribs, the first and second ribs being known as the first cut, the third and fourth as _the second_ cut, etc.. [Woman's Institute Library of Cookery Volume 3: Soup; Meat; Poultry and Game; Fish and Shell Fish]

[Footnote 15: The step-and-a-half (augmented second) is "unmelodic" because it is the same size as a _minor third_ and the mind finds it difficult to take in as a _second_ (notes representing it being on adjacent staff-degrees) an interval of the same size as a third.] 1 whole 2 half 3 whole 4 whole 5 whole 6 whole 7 half 8 step step step step step step step. [Music Notation and Terminology]

If "Sweet Bells" had come first, and "Illusion" second, you would have seen this sad falling off in the _second_ book.. [The Giant's Robe]

And so with all other brave and rightly trained men; their work is first, their fee second -- very important always, but still _second_.. [The Crown of Wild Olive also Munera Pulveris; Pre-Raphaelitism; Aratra Pentelici; The Ethics of the Dust; Fiction, Fair and Foul; The Elements of Drawing]

And as His _first_ coming was terminated by His Ascension, so will there be a second Ascension at His _second_. [Memories of Bethany]

Thus, if the tincture of the field should occur a second time, reference is made to it in the formula -- “_of the field_:” or, perhaps more frequently -- “_of the first_;” or, if the tincture that is named second in order in the blazoning be repeated, it is indicated by the expression -- “_of the second_;” and so on.. [The Handbook to English Heraldry]

Although Scripture speaks of a first resurrection and a second death, it makes no mention of a _second resurrection_.. [An Essay on the Scriptural Doctrine of Immortality]

Does anyone believe for a second that baidu, etc. won't mutate into ad-infested pay-for-ranking "services" the * second* that Google ceases to offer its clean, fast, technologically superior template?. [Imagethief]

(No. 13, p. 203.), with regard to the double second lessons for the Feast of St. Michael and All-Angels, is easily resolved by comparing the Table of Proper Lessons before and after the last review of the _Prayer Book_ in 1662; from which it will be seen, that the proper _second_ lessons were then appointed for the first time, while the old second lessons for Sept. 29. were retained, either from inadvertence, or to avoid the necessity of disarranging all the subsequent part of the calendar.. [Notes and Queries, Number 15, February 9, 1850]

And when these things are put in their proper order, prayer first, and the other things second; _second_, I say, not omitted, not slurred over; done with all the earnestness and power of brain and hand and heart possible; but done _after_ the victory has been won in secret, against the real foe, and done _while_ the winner is still claiming the victory already assured, -- then will come far greater achievements in this outer open service.. [Quiet Talks on Prayer]

The term "second best," is misleading, says Richard Laermer, marketing consultant and author of. [ News]

"Coming in second is a perfect start to creating a real sports culture in India," said Majumdar.. [India: 'Today the Commonwealth Games, tomorrow the Olympics']

"Coming in second is a perfect start to creating a real sports culture in India," said Mazumdar.. [Commonwealth Games 2010 finish with India triumphant]

If the term second-hand clothing turns you off, then you want to buy a new prom dress, not a vintage one.. [Figure Vintage | SciFi, Fantasy & Horror Collectibles]

Second Translates

TurkishSecond English to Turkish Translate
i. saniye.i. saniye.

Second on Social Media


@ChelseaFC: [email protected]: ‘It was a hard game, especially in the first half, but in the second half we controlled the game and we scor…


Luigi struggled with always being second played and drowned his troubles in liquor and illegal drugs. He’s currentl…


We’re doing that Alabama basketball thing again. Where we crush the first half and choke the second away.

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Teen Titans Go! | Happy Second Christmas | DC Kids
Teen Titans Go! | Happy Second Christmas | DC Kids
Second - Mira a la Gente
Second - Mira a la Gente

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Second Word Data

  • Pronunciations(sĕkˈənd)
  • Character6
  • Hyphenation sec ond
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