subdupleadj.

Brit.

/ˌsʌbˈdjuːpl/,

/ˌsʌbˈdʒuːpl/, U.S.

/ˌsəbˈd(j)up(ə)l/

Origin: A borrowing from Latin. Etymon: Latin subduplus.

Etymology: < post-classical Latin subduplus (6th cent.) < classical Latin sub- sub- prefix + duplus duple adj.

Mathematics. Now historical.

Designating a proportion or ratio of one to two; that is equal to half of some given quantity.

ΘΚΠ

the world > relative properties > number > ratio or proportion > [adjective] > submultiple > particular

under-doublec1430

under-doubledc1430

subduple1570

subtriple1570

subduplicate1656

subtriplicate1656

1570 H. Billingsley tr. Euclid Elements Geom. ix. f. 227 The numbers E, HK, L, and M, are vnto FG, as vnitie and the numbers A, B, C, are vnto D (namely, in subduple proportion).

1648 Bp. J. Wilkins Math. Magick i. vii. 47 One of these under Pulleys doth abate halfe of that heavinesse which the weight hath in it self, and cause the power to be in a sub-duple proportion unto it.

1706 W. Jones Synopsis Palmariorum Matheseos 55 The Ratio of 3 to 6 is 3/6 = ½ or subduple.

1728 E. Chambers Cycl. at Subnormal The Subnormal PR is Subduple the Parameter; and, consequently, an invariable Quantity.

1809 W. Nicholson Brit. Encycl. VI. (at cited word) 3 is said to be subduple of 6, as 6 is duple of 3.

1857 J. S. Eaton Treat. Arithm. 163 The half, third, fourth, etc. of a ratio are called the sub-duple, sub-triple, sub-quadruple ratio, etc.

1991 C. B. Boyer & U. C. Merzbach Hist. Math. (ed. 2) xiv. 262 In the same way the theory of proportions included subduple or subtriple or sub-n-tuple proportion, in which quantities vary as the second or third or nth root.

This entry has been updated (OED Third Edition, June 2012; most recently modified version published online March 2022).

单词	subduple
释义	subdupleadj. Brit. /ˌsʌbˈdjuːpl/, /ˌsʌbˈdʒuːpl/, U.S. /ˌsəbˈd(j)up(ə)l/ Origin: A borrowing from Latin. Etymon: Latin subduplus. Etymology: < post-classical Latin subduplus (6th cent.) < classical Latin sub- sub- prefix + duplus duple adj. Mathematics. Now historical. Designating a proportion or ratio of one to two; that is equal to half of some given quantity. ΘΚΠ the world > relative properties > number > ratio or proportion > [adjective] > submultiple > particular under-doublec1430 under-doubledc1430 subduple1570 subtriple1570 subduplicate1656 subtriplicate1656 subtriplicate1656 1570 H. Billingsley tr. Euclid Elements Geom. ix. f. 227 The numbers E, HK, L, and M, are vnto FG, as vnitie and the numbers A, B, C, are vnto D (namely, in subduple proportion). 1648 Bp. J. Wilkins Math. Magick i. vii. 47 One of these under Pulleys doth abate halfe of that heavinesse which the weight hath in it self, and cause the power to be in a sub-duple proportion unto it. 1706 W. Jones Synopsis Palmariorum Matheseos 55 The Ratio of 3 to 6 is 3/6 = ½ or subduple. 1728 E. Chambers Cycl. at Subnormal The Subnormal PR is Subduple the Parameter; and, consequently, an invariable Quantity. 1809 W. Nicholson Brit. Encycl. VI. (at cited word) 3 is said to be subduple of 6, as 6 is duple of 3. 1857 J. S. Eaton Treat. Arithm. 163 The half, third, fourth, etc. of a ratio are called the sub-duple, sub-triple, sub-quadruple ratio, etc. 1991 C. B. Boyer & U. C. Merzbach Hist. Math. (ed. 2) xiv. 262 In the same way the theory of proportions included subduple or subtriple or sub-n-tuple proportion, in which quantities vary as the second or third or nth root. This entry has been updated (OED Third Edition, June 2012; most recently modified version published online March 2022). < adj.1570
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