a. [ad. late L. subtriplus: see SUB- 10 and TRIPLE a.]

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  1.  Math. That is one third of a quantity or number; denoting a proportion of 1 to 3; (of a ratio) of which the antecedent is one-third of the consequent.

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1644.  Digby, Nat. Bodies, viii. § 6. 60. Which must be in subtriple proportion of the diameter of the sunne to the diameter of the great orbe.

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a. 1696.  Scarburgh, Euclid (1705), 180. As 13 to 4 inverted, is 4 to 13 viz Subtriple sesquiquartal.

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1719.  Quincy, Compl. Disp., 14. The Proportion of White Lead to Lead itself comes out still less, i. e. sub-triple.

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1728.  Chambers, Cycl.

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  2.  Sub-triple Spot, a moth (see quot.).

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1832.  J. Rennie, Butterfl. & M., 179. The Sub-triple Spot (Paramesia subtripunctulana).

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