资料来源 : pyDict

昼夜平分点,春分或秋分

资料来源 : Webster's Revised Unabridged Dictionary (1913)

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}.

            When descends on the Atlantic The gigantic Stormwind
            of the equinox.                       --Longfellow.

   2. Equinoctial wind or storm. [R.] --Dryden.

资料来源 : WordNet®

equinox
     n 1: 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
     2: (astronomy) either of the two celestial points at which the
        celestial equator intersects the ecliptic [syn: {equinoctial
        point}]