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- Second - Wikipedia
The second (symbol: s) is a unit of time derived from the division of the day, first into hours, then into minutes, and lastly into seconds, for a total of 24 × 60 × 60 = 86 400 seconds per day That definition, based on 1⁄86400 of a rotation of the Earth, is still used by the Universal Time 1 (UT1) system
- SECOND Definition Meaning - Merriam-Webster
The meaning of SECOND is next to the first in place or time How to use second in a sentence
- SECOND | English meaning - Cambridge Dictionary
SECOND definition: 1 immediately after the first and before any others: 2 the position in which a person finishes a… Learn more
- Second | Measurement, Timekeeping, Clock | Britannica
second, fundamental unit of time, now defined in terms of the radiation frequency at which atoms of the element cesium change from one state to another
- Second - definition of second by The Free Dictionary
1 In the second order, place, or rank: finished second 2 But for one other; save one: the second highest peak
- Second - Simple English Wikipedia, the free encyclopedia
In science, a second is the time it takes for a caesium atom to vibrate 9,192,631,770 (around 9 billion) times Scientists measure the second this way because the length of a day changes all the time
- Second Definition (Illustrated Mathematics Dictionary)
Illustrated definition of Second: The basic unit of time There are 60 seconds in 1 minute and 3,600 seconds in an hour In this clock the hand
- SECOND Definition Meaning | Dictionary. com
SECOND definition: next after the first; being the ordinal number for two See examples of second used in a sentence
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