Learn how to say Equinoxes correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word equinox:
the time or date (twice each year) at which the sun crosses the celestial equator, when day and night are of equal length (about 22 September and 20 March).
another term for equinoctial point.
late Middle English: from Old French equinoxe or Latin aequinoctium, from aequi- ‘equal’ + nox, noct- ‘night’