noun Download 🔗Share The intersection of the apparent path of the sun in the sky (the ecliptic) with the celestial equator. Examples : "The equinox occurs twice a year, marking the moment when the sun's path crosses the celestial equator. " astronomy space time weather nature science Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share One of the two days on which this intersection occurs each year: (for the Northern hemisphere) March 20 or 21 in the spring and September 22 or 23 in the autumn. Examples : "The spring equinox is on March 20th or 21st each year, which means the school year usually starts around that time. " astronomy nature time world science event geography Chat with AIVocabulary GamePractice Reading