Hypernyms for "unit of time"

15 minutes 24-hour interval 30 minutes 60 minutes attosecond bell day ephemeris time femtosecond half-hour hour hr mean solar day mean solar time mean time microsecond millisecond min minute month msec nanosecond night picosecond quarter quarter-hour s sec second ship''s bell sidereal day solar day TDT terrestrial dynamical time terrestrial time TT twenty-four hour period twenty-four hours