Hours
Jump to navigation
Jump to search
Hours
Hours (pronunciation: /ˈaʊərz/; etymology: from Old French hore, from Latin hora, from Greek hōra) 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 hour was initially established in the ancient Near East as a variable measure of 1/12 of the night or daytime. Such seasonal, temporal, or unequal hours varied by season and latitude.
Related Terms
- Minute: A unit of time equal to 60 seconds or 1/60th of an hour.
- Second: The basic unit of time in the International System of Units (SI), equal to the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom.
- 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.
- Week: A period of seven days.
- Month: A unit of time, used with calendars, which is approximately as long as a natural period related to the motion of the Moon; month and Moon are cognates.
- Year: The orbital period of the Earth moving in its orbit around the Sun.
See Also
External links
- Medical encyclopedia article on Hours
- Wikipedia's article - Hours
This WikiMD dictionary article is a stub. You can help make it a full article.
Languages: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
Urdu,
বাংলা,
తెలుగు,
தமிழ்,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
European
español,
Deutsch,
français,
русский,
português do Brasil,
Italian,
polski