Equinox
01
分点, 春分点または秋分点
(astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic
02
分点, 昼夜平分点
either of the two moments in a year when the Sun, in its apparent motion along the ecliptic, crosses the celestial equator, resulting in approximately equal periods of daylight and darkness worldwide
例
The spring equinox marks the beginning of spring in the Northern Hemisphere.
春分は北半球で春の始まりを告げます。
