autumnal equinox
English Thesaurus
1. (astronomy) the equinoctial point that lies in the constellation of Virgo (noun.location)
| hypernym | : | equinoctial point, equinox, |
| definition | : | (astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic (noun.location) |
| domain category | : | astronomy, uranology, |
| definition | : | the branch of physics that studies celestial bodies and the universe as a whole (noun.cognition) |
2. September 22 (noun.time)
| hypernym | : | equinox, |
| definition | : | 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 (noun.time) |
| part meronym | : | sep, sept, september, |
| definition | : | the month following August and preceding October (noun.time) |
| part meronym | : | autumn, fall, |
| definition | : | the season when the leaves fall from the trees (noun.time) |
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