fall equinox

Also found in: Thesaurus, Legal, Encyclopedia, Wikipedia.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.fall equinox - September 22fall equinox - September 22        
Sep, Sept, September - the month following August and preceding October
equinox - 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
autumn, fall - the season when the leaves fall from the trees; "in the fall of 1973"
References in periodicals archive ?
The point halfway between the fall equinox and the winter solstice has deep meaning to people whose lives are attuned to the passing of the seasons, because it's then that the Northern Hemisphere enters its darkest period.
Opening on the fall equinox and closing on the winter solstice, Emilie Halpern's third solo show at Pepin Moore seemed more in sync with cosmological rhythms than with the mundane cycles of the art world.
The earlier moonrise times are due to the fact that the moon's orbit around the earth has a slightly narrower angle with the horizon in the Northern Hemisphere at the time of the fall equinox.