subduple, a. Math.
(sʌbˈdjuːp(ə)l, ˈsʌbdjuːp(ə)l)
[ad. late L. subduplus: see sub- 10 and duple a.]
That is half of a quantity or number; denoting a proportion of one to two; (of a ratio) of which the antecedent is half the consequent.
| 1609 Dowland Ornith. Microl. 63 Euery Proportion is..taken away by the comming of his contrary proportion... As by the comming of a subduple, a dupla is taken away, and so of others. 1648 [see sub- 10]. 1706 W. Jones Syn. Palmar. Matheseos 55 The Ratio of 3 to 6 is 3/6 = ½ or sub⁓duple. 1715 tr. Gregory's Astron. (1726) II. 841 The number will be about subduple in a Jovial Year. 1728 Chambers Cycl. s.v. Subnormal, The Subnormal PR is Subduple the Parameter. 1740 Phil. Trans. XLI. 426 Let us take..Two Points at Pleasure, the Point A in the Circumference of the Equator, and the Point C in the Circumference of a subduple parallel Circle. |