From the Latin nōnārius, from nōnus (ninth) + -ārius (whence the English suffix -ary).


nonary (not comparable)

  1. Of ninth rank or order.
    • 1984 January 9, Walpole, L. J., “Fourth-Rank Tensors of the Thirty-Two Crystal Classes: Multiplication Tables”, in Proceedings of the Royal Society of London, Series A, Mathematical and Physical Sciences, volume 391, number 1800, JSTOR 2397534, pages 149-179:
      [] and the rhombic algebra is established as the direct sum of the nonary subalgebra of the Upq and of the three unary subalgebras generated individually by V, W and X, []

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