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epoch

The Oxford Pocket Dictionary of Current English | 2009 | Copyright

ep·och / ˈepək/ • n. a period of time in history or a person's life, typically one marked by notable events or particular characteristics: the Victorian epoch. ∎ the beginning of a distinctive period in the history of someone or something: Jewish reimmigration to Palestine marked an epoch in the history of Jewry. ∎ Geol. a division of time that is a subdivision of a period and is itself subdivided into ages: the Pliocene epoch.

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"epoch." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

"epoch." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O999-epoch.html

"epoch." The Oxford Pocket Dictionary of Current English. 2009. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-epoch.html

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epoch

A Dictionary of Astronomy | 1997 | Copyright

epoch The date and time at which an astronomical observation was made, or the date for which positions of celestial objects and orbital elements are calculated. Because of precession and nutation, celestial coordinates change with time, so that positions of celestial objects must be referred to a given date. The standard epoch now commonly used in ephemerides and star catalogues is 2000January1, 12 h (written as 2000.0).

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"epoch." A Dictionary of Astronomy. 1997. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

"epoch." A Dictionary of Astronomy. 1997. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O80-epoch.html

"epoch." A Dictionary of Astronomy. 1997. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O80-epoch.html

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epoch

A Dictionary of Earth Sciences | 1999 | | Copyright

epoch One of the intervals of geologic time recommended by the International Subcommission on Stratigraphic Terminology. An epoch is ranked as a third-order time unit, and is the equivalent of the chrono-stratigraphic unit series. Several epochs form a period; several periods an era. Epochs are themselves subdivided into ages. When used formally, the initial letter is capitalized, e.g. Early Devonian Epoch.

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AILSA ALLABY and MICHAEL ALLABY. "epoch." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "epoch." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O13-epoch.html

AILSA ALLABY and MICHAEL ALLABY. "epoch." A Dictionary of Earth Sciences. 1999. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-epoch.html

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epoch

A Dictionary of Ecology | 2004 | | Copyright

epoch One of the intervals of geological time recommended by the International Subcommission on Stratigraphic Terminology. An epoch is ranked as a third-order time unit, and is the equivalent of the chronostratigraphic unit ‘series’. Several epochs form a period, several periods an era. When used formally, the initial letter is capitalized (e.g. Early Devonian Epoch).

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MICHAEL ALLABY. "epoch." A Dictionary of Ecology. 2004. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "epoch." A Dictionary of Ecology. 2004. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O14-epoch.html

MICHAEL ALLABY. "epoch." A Dictionary of Ecology. 2004. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-epoch.html

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epoch

A Dictionary of Plant Sciences | 1998 | | Copyright

epoch One of the intervals of geological time recommended by the International Subcommission on Stratigraphic Terminology. An epoch is ranked as a third-order time unit, and is the equivalent of the chronostratigraphic unit ‘series’. Several epochs form a period; several periods an era. When used formally, the initial letter is capitalized, e.g. Early Devonian Epoch.

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MICHAEL ALLABY. "epoch." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "epoch." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O7-epoch.html

MICHAEL ALLABY. "epoch." A Dictionary of Plant Sciences. 1998. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-epoch.html

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epoch

The Columbia Encyclopedia, 6th ed. | 2011 | Copyright

epoch unit of geologic time that is a subdivision of a period. The Pleistocene and Holocene epochs, for example, are divisions of the Quaternary period. Epoch is also used to describe a short length of geologic time during a special occurrence, such as the glacial epoch. See geology ; Geologic Timescale (table).

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"epoch." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

"epoch." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1E1-epoch.html

"epoch." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-epoch.html

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epoch

A Dictionary of Computing | 2004 | | Copyright

epoch The time interval between successive elements of a discrete-time signal, or between the discrete-time samples of a continuous-time signal (see discrete and continuous systems). Usually, for a given signal, the epochs are of a fixed size.

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JOHN DAINTITH. "epoch." A Dictionary of Computing. 2004. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

JOHN DAINTITH. "epoch." A Dictionary of Computing. 2004. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O11-epoch.html

JOHN DAINTITH. "epoch." A Dictionary of Computing. 2004. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O11-epoch.html

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epoch

The Concise Oxford Dictionary of English Etymology | 1996 | | Copyright

epoch XVII. — modL. epocha — Gr. epokhḗ stoppage, station, fixed point of time, f. epékhein stop, take up a position, f. EPI- + ékhein hold, intr. be in a certain state.

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T. F. HOAD. "epoch." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

T. F. HOAD. "epoch." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O27-epoch.html

T. F. HOAD. "epoch." The Concise Oxford Dictionary of English Etymology. 1996. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O27-epoch.html

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Epoche

The Concise Oxford Dictionary of World Religions | 1997 | | Copyright

Epoche (bracketing out): see PHENOMENOLOGY.

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JOHN BOWKER. "Epoche." The Concise Oxford Dictionary of World Religions. 1997. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

JOHN BOWKER. "Epoche." The Concise Oxford Dictionary of World Religions. 1997. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O101-Epoche.html

JOHN BOWKER. "Epoche." The Concise Oxford Dictionary of World Religions. 1997. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O101-Epoche.html

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epoch

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"epoch." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

"epoch." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O233-epoch.html

"epoch." Oxford Dictionary of Rhymes. 2007. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-epoch.html

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