equinox
English Thesaurus
1. (astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic (noun.location)
| hypernym | : | celestial point, |
| definition | : | a point in the heavens (on the celestial sphere) (noun.location) |
| hyponym | : | vernal equinox, |
| definition | : | (astronomy) the equinoctial point that lies in the constellation of Pisces (noun.location) |
| hyponym | : | autumnal equinox, |
| definition | : | (astronomy) the equinoctial point that lies in the constellation of Virgo (noun.location) |
| domain category | : | astronomy, uranology, |
| definition | : | the branch of physics that studies celestial bodies and the universe as a whole (noun.cognition) |
2. 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)
| hypernym | : | cosmic time, |
| definition | : | the time covered by the physical formation and development of the universe (noun.time) |
| derivation | : | equinoctial, |
| definition | : | relating to an equinox (when the lengths of night and day are equal) (adj.pert) |
| derivation | : | equinoctial, |
| definition | : | relating to an equinox (when the lengths of night and day are equal) (adj.pert) |
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