Equinox
WordNet
noun
(1) (astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic
(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
WiktionaryText
Noun
- The intersection of the ecliptic (apparent path of the sun) with the celestial equator.
Hyponyms
- autumn equinox
- autumnal equinox
- March equinox
- September equinox
- spring equinox
- vernal equinox