AskDefine | Define equinoctial

Dictionary Definition

equinoctial adj
1 relating to the vicinity of the equator
2 relating to an equinox (when the lengths or night and day are equal) n : the great circle on the celestial sphere midway between the celestial poles [syn: celestial equator, equinoctial circle, equinoctial line]

User Contributed Dictionary



  1. of, or relating to an equinox
  2. of, or relating to the celestial or terrestrial equator


  1. the great circle midway between the celestial poles; the celestial equator
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