Equinox
[n] (astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic
[n] 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
Related Information
Related Terms
aphelion, apogee, astronomical longitude, autumnal equinox, celestial equator, celestial longitude, celestial meridian, circle, colures, ecliptic, equator, equinoctial, equinoctial circle, equinoctial colure, galactic longitude, geocentric longitude, geod