The story
- Latin · derived from(circulus) aequinoctiālis
- Old French · derived fromequinoxial
- Middle English · inherited fromequinoctial
- English todayequinoctial
Inherited from Middle English equinoctial, equinoccial, equinoxial, from Old French equinoxial, from Latin (circulus) aequinoctiālis, from aequinoctium + -alis.
Etymology from Wiktionary, CC BY-SA 4.0.