equinoctial

  1. Adjective.  of, or relating to an equinox.
  2. Adjective.  (astronomy) of, or relating to the celestial or terrestrial equator.
  3. Noun.  the great circle midway between the celestial poles; the celestial equator.
  4. Noun.  (rare) the terrestrial equator.

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This entry was last updated on RefTopia from its source on 3/20/2012.