Hour
Hour
Hour (pronunciation: /aʊər/) is a unit of time conventionally reckoned as 1/24 of a day and scientifically reckoned as 3,599–3,601 seconds, depending on conditions. The term comes from the Old English hōr, derived from the Proto-Germanic *hōraz with the Proto-Indo-European root *yer- meaning "year".
Etymology
The word "hour" is derived from the Old English hōr, which is related to the Old High German hōra, both of which come from the Proto-Germanic *hōraz. This, in turn, is derived from the Proto-Indo-European *yer- which means "year". The modern English word "hour" has kept this ancient meaning, as it still refers to a definite, fixed period of time.
Related Terms
- Minute: A unit of time equal to 60 seconds or 1/60th of an hour.
- Second: The base unit of time in the International System of Units (SI), it is qualitatively defined as the second division of the hour by sixty, the first division by sixty being the minute.
- Day: A unit of time. In common usage, it is either an interval equal to 24 hours or daytime, the consecutive period of time during which the Sun is above the horizon.
- Clock: A device used to measure, keep, and indicate time. The clock is one of the oldest human inventions, meeting the need to measure intervals of time shorter than the natural units: the day, the lunar month, and the year.
- Time: The indefinite continued progress of existence and events that occur in an apparently irreversible succession from the past, through the present, into the future.
External links
- Medical encyclopedia article on Hour
- Wikipedia's article - Hour
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