epoch
noun
1 epoch
A period marked by distinctive character or reckoned from a fixed point or event.
synonym: era.
Roget 118: the present, the present time, the present day, the present moment, the present juncture, the present occasion; the times, the existing time, the time being; today, these days, nowadays, our times, modern times, ... show more
Roget 114: chronometry, horometry†, horology; date, epoch; style, era. almanac, calendar, ephemeris; register, registry; chronicle, annals, ... show more
Roget 113: instantaneity, instantaneousness, immediacy; suddenness, abruptness. moment, instant, second, minute; twinkling, trice, flash, breath, ... show more
Roget 106: time, duration; period, term, stage, space, span, spell, season; the whole time, the whole period; space-time; course ... show more
Roget 108: period, age, era; second, minute, hour, day, week, month, quarter, year, decade, decenniumm lustrum†, quinquennium, ... show more
Dutch: eeuw, era, tijd, tijdperk, tijdvak
2 epoch
astronomy An arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded.
synonym: date of reference.
3 epoch
A unit of geological time that is a subdivision of a period and is itself divided into ages.
Polish: epoka
Moby thesaurus: 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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