Definition of autumnal equinox Autumnal equinox
au•tum•nal e•qui•nox
We found 5 definitions of autumnal equinox from 3 different sources.
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What does autumnal equinox mean?
WordNet
Noun |
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| autumnal equinox - September 22 | ||
| September equinox, fall equinox | ||
| 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 | ||
| autumn, fall a lapse into sin; a loss of innocence or of chastity; "a fall from virtue" | ||
| sep, september, sept the month following August and preceding October | ||
| autumnal equinox - (astronomy) the equinoctial point that lies in the constellation of Virgo | ||
| equinoctial point, equinox (astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic | ||
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Wiktionary 
Sailor's Word-BookThe Sailor's Word-Book ⛵
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autumnal equinox
The time when the sun crosses the equator, under a southerly motion, and the days and nights are then everywhere equal in length. (See LIBRA.)
