See Also: equinoctial(medicine)
equinoctial(dictionary)

equinoctial (iou)



equinoctial adjective & noun. LME.
[Old & mod. French equinoctial from Latin aequinoctalis, from aequinoctium: see EQUINOX, -AL1.]
A. adjective.
Pertaining to a state of equal day and night. LME.
equinoctial circle, equinoctial line the celestial or terrestrial equator. equinoctial point = EQUINOX 2.
Pertaining to the period or point of an equinox; happening near the time of an equinox, esp. designating gales that prevail near the autumnal equinox. L16.
equinoctial armilla: see ARMILLA 1. equinoctial day: of 12 hours duration. equinoctial month: containing one or other of the equinoxes.
Equatorial. L16.
b. noun.
a. The celestial equator. LME.
b. The terrestrial equator. Now rare. L16.
= EQUINOX 1. LME-M17.
An equinoctial gale. M18.