Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Noun: equinox  'ee-kwu,nóks or 'e-kwi,nóks
  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
    - equinoctial point

Derived forms: equinoxes

Type of: celestial point, cosmic time

Encyclopedia: Equinox