time unit

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a unit for measuring time periods
• Syn:
unit of time
• 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