hour
(redirected from How many seconds in a hour)Also found in: Dictionary, Thesaurus, Medical, Legal.
hour
1. a period of time equal to 3600 seconds; 1/24th of a calendar day
2. Astronomy an angular measurement of right ascension equal to 15° or a 24th part of the celestial equator
hour
Symbol: h. 1. A unit of time equal to 60 minutes, i.e. 1/24 of a day.
2. A unit of angle equal to 15° of arc, i.e. 1/24 of a circle. See right ascension.
hour
[au̇r] (mechanics)
A unit of time equal to 3600 seconds. Abbreviated h; hr.