ˌi:kwɪˈnɔkʃəl adj. & n. --adj. 1
happening at or
near the time of an
equinox (equinoctial gales). 2 of or relating to
equal day and night. 3 at or near the (terrestrial)
equator. --n. (in full equinoctial line) =
celestial equator. øequinoctial
point the point at
which the
ecliptic cuts the celestial equator (twice
each year at an equinox). equinoctial year see YEAR. [ME f. OF equinoctial or L aequinoctialis (as EQUINOX)]