vernal equinox

== English == === Pronunciation === === Noun === vernal equinox (plural vernal equinoxes) (astronomy) The moment when the sun appears to cross the celestial equator while tilting towards the observer, taking place in March in the northern hemisphere (March equinox) and September in the southern hemisphere (September equinox). ==== Synonyms ==== ==== Antonyms ==== ==== Coordinate terms ==== summer solstice winter solstice ==== Derived terms ==== vernal equinoctial ==== Translations ==== === Further reading === vernal equinox on Wikipedia.Wikipedia