relating to the equinox [adj EQUINOCTIALLY] / an equinoctial gale [n -S]
storm of violent winds and rain occurring at or near the time of an equinox and popularly, but erroneously, believed to be physically associated with it
pertaining to an equinox or the equinoxes, or to the equality of day and night
pertaining to the celestial equator
occurring at or about the time of an equinox
the great circle of the celestial sphere, lying in the same plane as the earth's equator