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1. (n.) epoch
a period of time marked by distinctive features, noteworthy events, changed conditions, etc.:
an epoch of peace.
2. epoch
the beginning of a distinctive period in the history of anything.
3. epoch
a point of time distinguished by a particular event or state of affairs; a memorable date.
4. epoch
any of several divisions of a geologic period during which a geologic series is formed.
5. epoch
an arbitrarily fixed instant of time used as a reference in giving the elements of the orbit of a celestial body.
Etymology: (1605–15; < NL epocha < Gk epochē pause, check, fixed point in time)
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| Definition of 'EPOCH' |
Princeton's WordNet |
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1. (noun) era, epoch
a period marked by distinctive character or reckoned from a fixed point or event
2. (noun) epoch, date of reference
(astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded
3. (noun) epoch
a unit of geological time that is a subdivision of a period and is itself divided into ages
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| Definition of 'EPOCH' |
Webster Dictionary |
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1. (noun) EPOCH
a fixed point of time, established in history by the occurrence of some grand or remarkable event; a point of time marked by an event of great subsequent influence; as, the epoch of the creation; the birth of Christ was the epoch which gave rise to the Christian era
2. (noun) EPOCH
a period of time, longer or shorter, remarkable for events of great subsequent influence; a memorable period; as, the epoch of maritime discovery, or of the Reformation
3. (noun) EPOCH
a division of time characterized by the prevalence of similar conditions of the earth; commonly a minor division or part of a period
4. (noun) EPOCH
the date at which a planet or comet has a longitude or position
5. (noun) EPOCH
an arbitrary fixed date, for which the elements used in computing the place of a planet, or other heavenly body, at any other date, are given; as, the epoch of Mars; lunar elements for the epoch March 1st, 1860
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| Definitions of 'EPOCH' |
The New Hacker's Dictionary |
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1. EPOCH
[Unix: prob.: from astronomical timekeeping] The time and date
corresponding to 0 in an operating system's clock and timestamp values.
Under most Unix versions the epoch is 00:00:00 GMT, January 1, 1970; under
VMS, it's 00:00:00 of November 17, 1858 (base date of the U.S. Naval
Observatory's ephemerides); on a Macintosh, it's the midnight beginning
January 1 1904. System time is measured in seconds or
ticks past the epoch. Weird problems may ensue when
the clock wraps around (see wrap around), which is
not necessarily a rare event; on systems counting 10 ticks per second, a
signed 32-bit count of ticks is good only for 6.8 years. The
1-tick-per-second clock of Unix is good only until January 18, 2038,
assuming at least some software continues to consider it signed and that
word lengths don't increase by then. See also
wall time. Microsoft Windows, on the other hand, has an epoch
problem every 49.7 days — but this is seldom noticed as Windows is almost
incapable of staying up continuously for that long.
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Sense: (the start of) a particular period of history, development etc
The invention of printing marked an epoch in the history of education.
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 Afrikaans: epog |
 Arabic: عَصْر |
 Bulgarian: епоха |
 Brazilian: época |
 Czech: epocha, mezník |
 German: die Epoche |
 Danish: epoke |
 Greek: εποχή |
 Spanish: época |
 Estonian: ajajärk |
 Farsi: آغاز دوران |
 Finnish: aikakausi |
 French: époque |
 Hebrew: תְּקוּפָה |
 Hindi: युग |
 Croatian: epoha, razdoblje |
 Hungarian: kor(szak) |
 Indonesian: jaman |
 Icelandic: tímamót |
 Italian: epoca |
 Japanese: 新時代 |
 Korean: (획기적이고도 특색있는) 시대, 시기 |
 Lithuanian: epocha |
 Latvian: laikmets |
 Malay: zaman |
 Dutch: tijdperk |
 Norwegian: tid(salder), epoke |
 Polish: epoka |
 Persian: آغاز دوران |
 Pashto: دوره، عصر، زمانه |
 Portuguese: época |
 Romanian: epocă |
 Russian: эпоха |
 Slovak: epocha, medzník |
 Slovenian: doba |
 Serbian: epoha |
 Swedish: epok |
 Thai: ช่วงเวลาสำคัญในอดีต |
 Turkish: çağ, devir |
 Taiwanese: 時代，新紀元 |
 Ukrainian: епоха, доба |
 Urdu: کسی عہد کی ابتدا |
 Vietnamese: kỷ nguyên |
 Chinese: 时代，新纪元 |
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