autumnal equinox
1. September 22 • Syn: September equinox, fall equinox • Ant: vernal equinox • Hypernyms: equinox • Part Holonyms: fall, autumn, September, Sep, Sept 2. (astronomy) the equinoctial point that lies in the constellation of Virgo • Topics: astronomy, uranology • Hypernyms: equinoctial point, equinox
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