equinoctial

== English == === Alternative forms === (archaic) æquinoctial === Etymology === Inherited from Middle English equinoctial, equinoccial, equinoxial, from Old French equinoxial, from Latin (circulus) aequinoctiālis, from aequinoctium + -alis. === Pronunciation === (Received Pronunciation) IPA(key): /ˌɛk.wɪˈnɒk.ʃəl/ (General American) IPA(key): /ˌiː.kwəˈnɑk.ʃəl/, /ˌɛk.wəˈnɑk.ʃəl/ === Adjective === equinoctial (not comparable) (astronomy) Of or relating to the spring or autumnal equinox. an equinoctial gale or storm, i.e. one happening at or near the time of the equinox, in any part of the world (astronomy) Of or relating to the celestial equator. (uncommon) Equatorial: Of or relating to the equator of the Earth. ==== Synonyms ==== (relating to the equinox): (uncommon) equinoctal, (archaic) equinoxial (relating to the terrestrial equator): See equatorial ==== Derived terms ==== ==== Translations ==== === Noun === equinoctial (plural equinoctials) The great circle midway between the celestial poles; the celestial equator. (rare) The terrestrial equator. An equinoctial gale. ==== Translations ==== === References === John A. Simpson and Edmund S. C. Weiner, editors (1989), “equinoctial”, in The Oxford English Dictionary, 2nd edition, Oxford: Clarendon Press, →ISBN.