Autumnal Equinox

   The first day of fall, about September 23. This is when the day and night are of equal length and the Sun rises due east and sets due west. See Vernal Equinox.

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  • Autumnal equinox — Autumnal Au*tum nal, a. [L. auctumnalis, autumnalis: cf. F. automnal.] 1. Of, belonging to, or peculiar to, autumn; as, an autumnal tint; produced or gathered in autumn; as, autumnal fruits; flowering in autumn; as, an autumnal plant. [1913… …   The Collaborative International Dictionary of English

  • autumnal equinox — /ɔˌtʌmnəl ˈikwənɒks/ (say aw.tumnuhl eekwuhnoks) noun 1. Also, September equinox. See equinox (def. 1). 2. Also, autumnal point. the position of the sun on the celestial equator at the time of the autumnal equinox …   Australian English dictionary

  • autumnal equinox — 1. See under equinox (def. 1). 2. Also called autumnal point. the position of the sun at the time of the autumnal equinox. [1670 80] * * * …   Universalium

  • autumnal equinox — autum′nal e′quinox n. 1) astron. See under equinox 2) astron. Also called autum′nal point′. the position of the sun at the time of the autumnal equinox • Etymology: 1670–80 …   From formal English to slang

  • autumnal equinox — noun 1. September 22 • Syn: ↑September equinox, ↑fall equinox • Ant: ↑vernal equinox • Hypernyms: ↑equinox • Part Holonyms: ↑fall …   Useful english dictionary

  • autumnal equinox — noun a) the moment when the sun appears to cross the celestial equator, heading southward b) the point where the ecliptic intersects the celestial equator at that time …   Wiktionary

  • autumnal equinox — i. The point of intersection of the ecliptic and celestial equator (equinoctial) when the sun is moving from north to south. Also called the first point of Libra. ii. The time of the crossing of the sun across the celestial equator from north to… …   Aviation dictionary

  • Autumnal — Au*tum nal, a. [L. auctumnalis, autumnalis: cf. F. automnal.] 1. Of, belonging to, or peculiar to, autumn; as, an autumnal tint; produced or gathered in autumn; as, autumnal fruits; flowering in autumn; as, an autumnal plant. [1913 Webster] Thick …   The Collaborative International Dictionary of English

  • Autumnal point — Autumnal Au*tum nal, a. [L. auctumnalis, autumnalis: cf. F. automnal.] 1. Of, belonging to, or peculiar to, autumn; as, an autumnal tint; produced or gathered in autumn; as, autumnal fruits; flowering in autumn; as, an autumnal plant. [1913… …   The Collaborative International Dictionary of English

  • Autumnal signs — Autumnal Au*tum nal, a. [L. auctumnalis, autumnalis: cf. F. automnal.] 1. Of, belonging to, or peculiar to, autumn; as, an autumnal tint; produced or gathered in autumn; as, autumnal fruits; flowering in autumn; as, an autumnal plant. [1913… …   The Collaborative International Dictionary of English

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