aequinoctialis

aequĭnoctĭālis, e, adj. [aequinoctium],

pertaining to the equinox , or the time of equal day and night , equinoctial : circulus, the equator , Varr. L. L. 9, § 24 Müll.: aestus, Sen. Q. N. 3, 28 (cf. aequinoctium fin. ). horae, Plin. 2, 97, 99, § 216: meridies, Col. 1, 6, 2.