great year

great year
noun
time required for one complete cycle of the precession of the equinoxes, about 25,800 years
• Syn: ↑Platonic year
• Hypernyms: ↑time period, ↑period of time, ↑period

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noun
Etymology: Middle English grete yere, translation of Latin annus magnus, translation of Greek megas eniautos
: the period of about 25,800 years required for a complete cycle of precession of the equinoxes during which time the celestial pole describes a complete circle around the ecliptic pole

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Astron.
[1905-10]

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great year noun (astronomy)
The length of time (about 25800 years) it takes for the equinoctial points to make a complete revolution
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Main Entry: ↑great
————————
great year see ↑Platonic year below.
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Main Entry: ↑year

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great year,
Astronomy. the period of a revolution of the equinoctial points, about 25,800 years; Platonic year.

Useful english dictionary. 2012.

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Look at other dictionaries:

  • Great year — Year Year, n. [OE. yer, yeer, [yogh]er, AS. ge[ a]r; akin to OFries. i?r, g?r, D. jaar, OHG. j[=a]r, G. jahr, Icel. [=a]r, Dan. aar, Sw. [*a]r, Goth. j?r, Gr. ? a season of the year, springtime, a part of the day, an hour, ? a year, Zend y[=a]re… …   The Collaborative International Dictionary of English

  • great year — n. one full cycle of precession of the equinoxes, equal to c. 25,800 years …   English World dictionary

  • Great year — A Great year (also known as a Platonic year or Equinoctial cycle) is the time required for one complete cycle of the precession of the equinoxes, about 25,765 years, at the current rate. Astrologers consider it important, while modern day… …   Wikipedia

  • great year — Platonic Pla*ton ic, Platonical Pla*ton ic*al, a. [L. Platonicus, Gr. ?: cf. F. platonique.] 1. Of or pertaining to Plato, or his philosophy, school, or opinions. [1913 Webster] 2. Pure, passionless; nonsexual; philosophical. [1913 Webster]… …   The Collaborative International Dictionary of English

  • great year — Astron. See Platonic year. [1905 10] * * * …   Universalium

  • great year —    the Platonic year …   Dictionary of units of measurement

  • great year — noun Date: circa 1741 the period of about 25,800 years required for one complete cycle of the equinoxes around the ecliptic …   New Collegiate Dictionary

  • Great Year. — See Magnus Annus. * * * …   Universalium

  • Great Year. — See Magnus Annus …   Useful english dictionary

  • Year — Year, n. [OE. yer, yeer, [yogh]er, AS. ge[ a]r; akin to OFries. i?r, g?r, D. jaar, OHG. j[=a]r, G. jahr, Icel. [=a]r, Dan. aar, Sw. [*a]r, Goth. j?r, Gr. ? a season of the year, springtime, a part of the day, an hour, ? a year, Zend y[=a]re year …   The Collaborative International Dictionary of English

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