, denotes (5/12)ths of any thing. So 10 is quincunx of 24, being (5/12) of it.
Quincunx, in Astronomy, is that position, or aspect, of the planets, when distant from each other by (5/12)ths. of the whole circle, or 5 signs out of the 12, that is 150 degrees. The Quincunx is marked Q, or Vc.
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Entry taken from A Mathematical and Philosophical Dictionary, by Charles Hutton, 1796.
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