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equinox


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The time or date (twice each year) at which the sun crosses the celestial equator, when day and night are of equal length (about 22 September and 20 March).

See also precession of the equinoxes.

Subjects: Science and Mathematics.

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equinox
in A Dictionary of Physics

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equinox
in A Dictionary of Astronomy

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equinox
in A Dictionary of Weather

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equinox
in The Oxford Dictionary of Phrase and Fable

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