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vernal equinox

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English

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Noun

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vernal equinox (plural vernal equinoxes)

  1. (astronomy) The moment at which the Sun crosses the celestial equator, appearing to tilt toward the observer, occurring in March in the Northern Hemisphere and in September in the Southern Hemisphere.
    Synonyms: northward equinox, spring equinox
    Antonyms: autumnal equinox, southward equinox
    Coordinate terms: summer solstice, winter solstice

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