time unit
Noun

A unit for measuring time periods (synset 115179734)
hypernym: amount, measure, quantity  how much there is or how many there are of something that you can quantifyhyponym:
 24hour interval, day, mean solar day, solar day, twentyfour hour period, twentyfour hours  time for Earth to make a complete rotation on its axis
 night  the dark part of the diurnal cycle considered a time unit
 mean solar time, mean time  (astronomy) time based on the motion of the mean sun (an imaginary sun moving uniformly along the celestial equator)
 ephemeris time, tdt, terrestrial dynamical time, terrestrial time, tt  (astronomy) a measure of time defined by Earth's orbital motion; terrestrial time is mean solar time corrected for the irregularities of the Earth's motions
 month  a time unit of approximately 30 days
 day, sidereal day  the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day
 bell, ship's bell  (nautical) each of the eight halfhour units of nautical time signaled by strokes of a ship's bell; eight bells signals 4:00, 8:00, or 12:00 o'clock, either a.m. or p.m.
 60 minutes, hour, hr  a period of time equal to 1/24th of a day
 30 minutes, halfhour  a half of an hour
 15 minutes, quarterhour  a quarter of an hour
 min, minute  a unit of time equal to 60 seconds or 1/60th of an hour
 quarter  a unit of time equal to 15 minutes or a quarter of an hour
 s, sec, second  1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites
 attosecond  one quintillionth (10^18) of a second; one thousandth of a femtosecond
 femtosecond  one quadrillionth (10^15) of a second; one thousandth of a picosecond
 picosecond  one trillionth (10^12) of a second; one thousandth of a nanosecond
 nanosecond  one billionth (10^9) of a second; one thousandth of a microsecond
 microsecond  one millionth (10^6) of a second; one thousandth of a millisecond
 millisecond, msec  one thousandth (10^3) of a second
synonym: unit of time
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