E"qui*nox (?), n. [OE. equinoxium, equenoxium, L. aequinoctium; aequus equal + nox, noctis, night: cf. F. 'equinoxe. See Equal, and Night.]
1.
The time when the sun enters one of the equinoctial points, that is, about March 21 and September 22. See Autumnal equinox, Vernal equinox, under Autumnal and Vernal.
When descends on the Atlantic
The gigantic
Stormwind of the equinox.
Longfellow.
2.
Equinoctial wind or storm.
[R.]
Dryden.
© Webster 1913.