[1] The second thus defined is, This definition was ratified by the Eleventh General Conference on Weights and Measures in 1960. Because this second was the independent variable of time used in ephemerides of the Sun and Moon during most of the twentieth century (Newcomb's Tables of the Sun were used from 1900 through 1983, and Brown's Tables of the Moon were used from 1920 through 1983), it was called the ephemeris second.[1]. ms or msec One thousandth of a second. See more. Leap Seconds. This is equal to 365 days per year divided by 12 months per year. Another word for second. tim: The basis of the Hebrew measurement of time was the day and the lunar month, as with the Semites generally. It is used as a standard moment of time, and does not necessarily refer to a real second, and could be shorter or longer depending on the scenario. The second is the basic unit of time. In physical science, time is defined as a measurement, or as what the clock face reads. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. The ground state is defined at zero magnetic field. Second definition, next after the first; being the ordinal number for two. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. speed is a meter per second, in SI units). an extra serving of food given after the first serving has been eaten: Would anybody like seconds? Here "sub-exponential time" is taken to mean the second definition presented below. Enter the time value and units you want to convert from, then choose the time unit you want to convert to. https://www.thefreedictionary.com/seconds, [Middle English, from Old French, from Latin, The outer envelope might then be cast off as a useless encumbrance; and the, In that moment Boxtel's exasperation was the more fierce, as, though suspecting that Cornelius possessed a, When he had explained his wishes to the chief, the latter, though at heart hating and fearing Muda Saffir, dared not refuse; but to a, They went out presently to go up to the top of the hill, where I used to go; but they being strong, and a good company, nor alone, as I was, used none of my cautions to go up by the ladder, and pulling it up after them, to go up a, In the first case the two sexual elements which go to form the embryo are perfect; in the, Besides, they felt that the denouement of this. Aldo award is well deserved. HELOCs are often used as second mortgages. second (n.1) "one-sixtieth of a minute of degree," also "sixtieth part of a minute of time," late 14c. Current local time in UTC. ... Aldo may not have been the greatest man manager of all time but his motivational skills were second to none. Ahead of One's Time. in geometry, from Old French seconde, from Medieval Latin secunda, short for secunda pars minuta "second diminished part," the result of the second division of the hour by sixty (the first being the "prime minute," now called the minute), from Latin secunda, fem. In a full circle there are 360 degrees. TIME. In physics and engineering, the time constant, usually denoted by the Greek letter τ (tau), is the parameter characterizing the response to a step input of a first-order, linear time-invariant (LTI) system. There are 60 seconds per minute. The second (symbol: s), sometimes abbreviated sec., is the name of a unit of time. Time definition is - the measured or measurable period during which an action, process, or condition exists or continues : duration. There are 60 seconds in one minute, 60 minutes (or 3,600 seconds) in one hour, and 24 hours (86,400 seconds) in one day. The revised definition would seem to imply that the ideal atomic clock would contain a single caesium atom at rest emitting a single frequency. The UK is in the Western European Time Zone. This is the British English definition of second. n. 1. a. More commonly encountered, non-SI units of time such as the minute, hour, and day increase by multiples of 60 and 24 (rather than by powers of ten as in the SI system). a short unit of time that is equal to a 60th of a minute: There are 60 seconds in a minute. second vice president at the bank; a leader second to none. Minutes . The first division was known as a "prime minute" and is equivalent to the minute we know today. b. 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