1. September equinox

noun. September 22.
Synonyms
Sept Sep autumn autumnal equinox equinox September fall equinox fall
Antonyms
vernal equinox autumnal equinox crescendo expand inflate

2. mid-September

noun. The middle part of September.
Synonyms
Sept period of time Sep period September time period
Antonyms
vernal equinox overtime work time downtime regulation time

3. September

noun. The month following August and preceding October.
Synonyms
mid-September Sep 11 Gregorian calendar month New Style calendar 9/11 Citizenship Day September equinox American Indian Day Labor Day Sept September 11 Sep Michaelmas 9-11 Michaelmas Day Sept. 11 autumnal equinox September 17 September 29 Gregorian calendar fall equinox
Antonyms
vernal equinox

4. equinox

noun. (ˈiːkwəˌnɑːks) (astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic.
Synonyms
vernal equinox celestial point autumnal equinox equinoctial point
Antonyms
antapex nadir apex point of apoapsis point of periapsis
Etymology
equinox (English)
aequinoctium (Latin)

5. equinox

noun. (ˈiːkwəˌnɑːks) Either of two times of the year when the sun crosses the plane of the earth's equator and day and night are of equal length.
Synonyms
vernal equinox cosmic time autumnal equinox spring equinox March equinox fall equinox September equinox
Antonyms
autumnal equinox vernal equinox apoapsis periapsis zenith
Etymology
equinox (English)
aequinoctium (Latin)
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