(astronomy) the equinoctial point that lies in the constellation of Virgo see more noun September 22 synonyms:September equinox,fall equinox see more Cite this entry Style: MLA "Autumnal equinox."Vocabulary.com Dictionary,Vocabulary.com, https://www.vocabulary.com/dictionary/autumnal equinox. Accessed...
Define autumnal equinox. autumnal equinox synonyms, autumnal equinox pronunciation, autumnal equinox translation, English dictionary definition of autumnal equinox. n. 1. One of two points at which the ecliptic intersects the celestial equator. At the au
Remembering details- remember what you've learned about how ancient civilizations made their own predictions about equinoxes Learning practice- use what you know to answer questions about the event in astronomy at the beginning of fall and the special lights that can be seen in northern latitudes ...
Related to autumnal:autumnal equinox au·tumn (ô′təm) n. 1.The season of the year between summer and winter, during which the weather becomes cooler and many plants become dormant, extending in the Northern Hemisphere from the autumnal equinox to the winter solstice and popularly conside...
What causes the seasons?In many parts of the world, weather cycles through the four seasons like clockwork: spring, summer, autumn, and winter.(more) See all videos for this article According to the astronomical definition of theseasons, the autumnal equinox also marks the beginning ofautumn, ...