[ ee-kwuh-noks ]
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Part of Speech noun
Origin + Etymology
Late Middle English; Latin from Old French equinoxe or Latin aequinoctium, from aequi- ‘equal’ + nox, noct- ‘night’
  • vernal equinox
  • celestial point
  • autumnal equinox
  • equinoctial point
  • antapex
  • nadir
  • apex
the time or date (twice each year) at which the sun crosses the celestial equator, when day and night are of approximately equal length
The equinox has historically been a time of celebration of the arrival of spring or fall.
Usage Over Time

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