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subduple
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subduple
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 b...
Oxford English Dictionary
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under-double
† ˈunder-ˌdouble Obs. [under-1 6 b: cf. subdouble s.v. sub- 10.] = subduple. Also † under-doubled ppl. a. Obs.c 1430 Art of Nombryng (E.E.T.S.) 16 It shewithe that a nombre componede was the quadrat, and his rote a digit last founde with vnder-double other vndirdoubles. Ibid., Neþer to sette the dou...
Oxford English Dictionary
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subduplicate
subˈduplicate, a. Math. [sub- 10.] 1. Of a ratio or proportion: Being that of the square roots of the quantities; thus, 2 : 3 is the subduplicate ratio of 4 : 9.1656 tr. Hobbes' Elem. Philos. 121 A Proportion is said to be Divided, when between two quantities are interposed one or more Means in cont...
Oxford English Dictionary
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sub-
sub-, prefix (sʌb, səb) repr. L. sub- = the prep. sub under, close to, up to, towards, used in composition (cf. under-) with the various meanings detailed below. (The related Skr. upa-, Gr. ὑπο- have a similar range of meaning.) The b of L. sub- remained unchanged when it preceded a radical beginnin...
Oxford English Dictionary
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