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fall equinox

DEFINITIONS OF: fall equinox

1

n September 22

Synonyms:
September equinox, autumnal equinox
Antonyms:
March equinox, spring equinox, vernal equinox
March 21
Type of:
equinox
either of two times of the year when the sun crosses the plane of the earth's equator and day and night are of equal length
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