equinox
/หiหkwษหnษหks/IPA: /IY1 K W AH0 N AA0 K S/
noun
- 1
The intersection of the apparent path of the sun in the sky (the ecliptic) with the celestial equator.
- 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.
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