autumnal equinox
1.
(
noun
) (astronomy) the equinoctial point that lies in the constellation of Virgo
Related Words:
equinoctial point
,
equinox
2.
(
noun
) September 22
Synonyms:
September equinox
,
fall equinox
Related Words:
equinox
Antonyms:
vernal equinox
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