nonagenary

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English

Etymology

From Latin nōnāgēnārius (“containing 90”) either directly or via Middle French nonagénaire, from Latin nōnāgēnī (“90 each”) + -ārius (“-ary”), from nōnāgintā (“nine tens, 90”).

Adjective

nonagenary (not comparable)

  1. (rare) Of or related to the number ninety.
    Coordinate terms: unary, binary, ternary, trinary, tetranary, quintenary, hexanary, septenary, octonary, nonary, decenary, vicenary, tricenary, quadragenary, quinquagenary, semicentenary, sexagenary, septuagenary, octogenary, centenary, millenary

Noun

nonagenary (plural nonagenaries)

  1. (astronomy, astrology, obsolete) Synonym of square or quadrature: a rising at a 90 degree angle to the position of another heavenly body, particularly the sun.
    • 1601, Pliny, translated by Philemon Holland, The Historie of the World, volume I, page 10:
      As for Mars, as he is neerer to the Sunne, so feeleth he the Sunne beames by a quadrant aspect, to wit, ninetie degrees: wherupon that motion tooke the name, called the first and second Nonagenarie, from both risings.

References

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