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equinoctial

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(ē′kwi näk′s̸həl)

adjective

relating to either of the equinoxes or to equal periods of day and night
occurring at or about the time of an equinox
equatorial

Origin: ME & OFr equinoxial < L aequinoctialis

noun

celestial equator
a storm occurring at or about the time of an equinox

See equinoctial in American Heritage Dictionary 4

adjective

Relating to an equinox.
Relating to the celestial equator.

noun

A violent storm of wind and rain occurring at or near the time of the equinox.
See celestial equator.

Origin:

Origin: Middle English equinoxial

Origin: , from Old French

Origin: , from Latin aequinoctiālis

Origin: , from aequinoctium, equinox; see equinox

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