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September equinox
DEFINITIONS OF:
September equinox
1
n
September 22
Synonyms:
autumnal equinox
,
fall 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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