equinox

Từ điển Oxford Learners Wordfinder Dictionary

noun

1. 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
• Derivationally related forms:
equinoctial
• Hypernyms:
cosmic time
• Hyponyms:
vernal equinox, March equinox, spring equinox, autumnal equinox, September equinox, fall equinox
2. (astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic
• Syn:
equinoctial point
• Topics:
astronomy, uranology
• Hypernyms:
celestial point
• Hyponyms:
vernal equinox, autumnal equinox