Word:

Epoch

Ep´och   Pronunciation: ĕp´ǒk or ē´pǒk; 277
n.1.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.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.(Geol.) A division of time characterized by the prevalence of similar conditions of the earth; commonly a minor division or part of a period.
4.(Astron.) The date at which a planet or comet has a longitude or position.
Noun1.epoch - a period marked by distinctive character or reckoned from a fixed point or event
Synonyms: era
2.epoch - (astronomy) the precise date that is the point of reference for which information (as coordinates of a celestial body) is referred
3.epoch - a unit of geological time
1.epoch - [Unix: probably 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 US 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.
2.epoch - (Epoch) A version of GNU Emacs for the X Window System from NCSA.
Bronze Age, Dark Ages, Depression Era, Golden Age, Ice Age, Iron Age, Jacksonian Age, Middle Ages, New Deal Era, Prohibition Era, Silver Age, Steel Age, Stone Age, age, days, era, glacial epoch, interval, term, time
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Epitrochlear
Epitrochoid
epitrochoidal engine
Epitrope
EPIX
Epizeuxis
Epizoan
Epizoic
Epizoon
Epizootic
EPK
epkwele
EPL
EPLD
EPN
EPOC
-- Epoch --
epoch-making
Epocha
Epochal
Epode
Epodic
Epona
Eponym
Eponymic
Eponymist
Eponymous
Eponymy
Epoophoron
Epopee
Epopt
Epos
Epotation
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