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Từ điển WordNet v3.1 - WordNet Dictionary
unit of time
a unit for measuring time periods • Syn: time unit • Hypernyms: measure, quantity, amount • Hyponyms: day, twenty-four hours, twenty-four hour period, 24-hour interval, solar day, mean solar day, night, mean time, mean solar time, terrestrial time, TT, terrestrial dynamical time, TDT, ephemeris time, month, sidereal day, bell, ship's bell, hour, hr, 60 minutes, half-hour, 30 minutes, quarter-hour, 15 minutes, minute, min, quarter, second, sec, s, attosecond, femtosecond, picosecond, nanosecond, microsecond, millisecond, msec
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