Equinox

ē′kwi-noks, n. the time when the sun cro es the equator, making the night equal in length to the day, about 21st March and 23d Sept.— adj. Equinoc′tial , pertaining to the equinoxes, the time of the equinoxes, or to the regions about the equator.— n. a great circle in the heavens corresponding to the equator of the earth.— adv. Equinoc′tially , in the direction of the equinox.— Equinoctial gales , high gales popularly supposed to prevail about the times of the equinoxes—the belief is unsupported by observation. [L. æquus , equal, nox , noctis , night.]