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equinox
From The Collaborative International Dictionary of English v.0.48:
Equinox \E"qui*nox\, n. [OE. equinoxium, equenoxium, L. aequinoctium; aequus equal + nox, noctis, night: cf. F. ['e]quinoxe. 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. [1913 Webster] When descends on the Atlantic The gigantic Stormwind of the equinox. --Longfellow. [1913 Webster] 2. Equinoctial wind or storm. [R.] --Dryden. [1913 Webster]

