equinox

/หˆiหkwษ™หŒnษ‘หks/

IPA: /IY1 K W AH0 N AA0 K S/

noun
  1. 1

    The intersection of the apparent path of the sun in the sky (the ecliptic) with the celestial equator.

  2. 2

    One of the two days on which this intersection occurs each year: (for the Northern hemisphere) March 20 or 21 in the spring and September 22 or 23 in the autumn.

Source: https://en.wiktionary.org/wiki/equinox