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autumnal equinox
[ aw-tuhm-nl ee-kwuh-noks, ek-wuh-noks ]
noun
- equinox1
- Also called autumnal point. the position of the sun at the time of the autumnal equinox.
autumnal equinox
noun
- the time at which the sun crosses the plane of the equator away from the relevant hemisphere, making day and night of equal length. It occurs about Sept 23 in the N hemisphere (March 21 in the S hemisphere)
- astronomy
- the point, lying in the constellation Virgo, at which the sun's ecliptic intersects the celestial equator
- the time at which this occurs as the sun travels north to south (23 September)
autumnal equinox
/ ô-tŭm′nəl /
- See under equinox
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Word History and Origins
Origin of autumnal equinox1
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Example Sentences
As Jupiter's northern hemisphere was passing through its autumnal equinox, they concluded they had landed exactly at the pole.
The summer had now passed, and the autumnal equinox was rapidly approaching.
The autumnal equinox day came round, and the monster ate nothing.
At the vernal and at the autumnal equinox I take a good meal, and that lasts me for half a year.
They call this autumnal equinox the beginning of the civil year, and the vernal equinox the beginning of the holy year.
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