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Noun unit of time has 1 sense
- time unit, unit of time - a unit for measuring time periods
--1 is a kind of measure, quantity, amount
--1 has particulars:
| ||day, twenty-four hours, solar day, mean solar day; night; mean time, mean solar time; terrestrial time, TT, terrestrial dynamical time, TDT, ephemeris time; month; sidereal day, day; bell, ship's bell; hour, hr, 60 minutes; half-hour, 30 minutes; quarter-hour, 15 minutes; minute, min; quarter; second, sec, s; millisecond, msec; attosecond; femtosecond; picosecond; nanosecond; microsecond|