equinoctial line equinoctial circle • equinoctially · · · Info · Definitions · Synonyms · Characters · · equinoctial line · · Text Common · · Latin · · Scripts 16 · · Length 6 · · Syllables Definitions · · · (noun) the great circle on the celestial sphere midway between the celestial poles. Synonyms: celestial equator, equinoctial circle, equinoctial line, equinoctial. · · Noun Definition 1 Synonyms · · · celestial equator · · Synonym 1 equinoctial circle · · Synonym 2 equinoctial · · Synonym 3 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F q latin small letter q U+0071 t latin small letter t U+0074 u latin small letter u U+0075