duadn.

/ˈdjuːad/

Forms: Also 1700s duade.

Etymology: < Greek δυάς, δυαδ-, ‘the number two’; probably influenced by Latin duo ; the normal representation of the Greek is dyad n.

1. A group or combination of two; a couple, a pair.

ΘΚΠ

the world > relative properties > number > specific numbers > two > pair > [noun]

pairc1300

couple1365

paira1382

gemels1382

pair1391

yokea1425

brace1430

binarya1464

match1542

twin1569

binity?1578

twoa1585

couplement1596

Gemini1602

couplet1604

twain1607

duad1660

dyad1675

duet1749

tway?a1800

doublet1816

two-group1901

two-grouping1901

coupling1961

1660 T. Stanley Hist. Philos. III. i. 55 The Duad is indeterminate; Monad is taken according to equality and measure, Duad according to excesse and defect.

1751 J. Harris Hermes ii. i. 226 Δυὰς ἐγνωσμένη, a known Duad, as Apollonius expresses himself.

1793 T. Beddoes Observ. Nature Demonstrative Evid. 133 Lord Monboddo..reduces without hesitation, the Greek primitives to the five duads already quoted.

1797 Monthly Mag. 3 517 What the Pythagoreans intended to signify by monad, duad, and triad.

1848 G. A. Poole Eccl. Archit. Contents x Three Duads of Ecclesiastical Builders.

1857 T. De Quincey Judas Iscariot (rev. ed.) in Select. Grave & Gay VII. 32 (note) [Aaron] is blind; [Moses] is dumb. But, moving as a co-operating Duad, they become the salvation of Israel.

Categories »

2. Mathematics. A combination of two things; a pair (considered without reference to the order of the two elements: e.g. ab and ba are the same duad).

Derivatives

duˈadic adj. relating to or consisting of duads.

ΘΚΠ

the world > relative properties > number > specific numbers > two > pair > [adjective]

double1393

coupledc1440

conjugate1471

duplicate?a1475

jumellec1475

gemel1497

geminate1589

paired1595

fellowed1654

duplicatory1659

gemellous1697

dyadic1728

duplex1817

Siamese twins1829

parial1849

dyad1869

duadic1879

pairwise1913

duplicitous1985

1879 J. J. Sylvester in Amer. Jrnl. Math. 2 94 Duadic disyntheme, any combination of duads..in which each element occurs twice and no oftener.

This entry has not yet been fully updated (first published 1897; most recently modified version published online December 2020).

单词	duad
释义	duadn. /ˈdjuːad/ Forms: Also 1700s duade. Etymology: < Greek δυάς, δυαδ-, ‘the number two’; probably influenced by Latin duo ; the normal representation of the Greek is dyad n. 1. A group or combination of two; a couple, a pair. ΘΚΠ the world > relative properties > number > specific numbers > two > pair > [noun] pairc1300 couple1365 paira1382 gemels1382 pair1391 yokea1425 brace1430 binarya1464 match1542 twin1569 binity?1578 twoa1585 couplement1596 Gemini1602 couplet1604 twain1607 duad1660 dyad1675 duet1749 tway?a1800 doublet1816 two-group1901 two-grouping1901 coupling1961 1660 T. Stanley Hist. Philos. III. i. 55 The Duad is indeterminate; Monad is taken according to equality and measure, Duad according to excesse and defect. 1751 J. Harris Hermes ii. i. 226 Δυὰς ἐγνωσμένη, a known Duad, as Apollonius expresses himself. 1793 T. Beddoes Observ. Nature Demonstrative Evid. 133 Lord Monboddo..reduces without hesitation, the Greek primitives to the five duads already quoted. 1797 Monthly Mag. 3 517 What the Pythagoreans intended to signify by monad, duad, and triad. 1848 G. A. Poole Eccl. Archit. Contents x Three Duads of Ecclesiastical Builders. 1857 T. De Quincey Judas Iscariot (rev. ed.) in Select. Grave & Gay VII. 32 (note) [Aaron] is blind; [Moses] is dumb. But, moving as a co-operating Duad, they become the salvation of Israel. Categories » 2. Mathematics. A combination of two things; a pair (considered without reference to the order of the two elements: e.g. ab and ba are the same duad). Derivatives duˈadic adj. relating to or consisting of duads. ΘΚΠ the world > relative properties > number > specific numbers > two > pair > [adjective] double1393 coupledc1440 conjugate1471 duplicate?a1475 jumellec1475 gemel1497 geminate1589 paired1595 fellowed1654 duplicatory1659 gemellous1697 dyadic1728 duplex1817 Siamese twins1829 parial1849 dyad1869 duadic1879 pairwise1913 duplicitous1985 1879 J. J. Sylvester in Amer. Jrnl. Math. 2 94 Duadic disyntheme, any combination of duads..in which each element occurs twice and no oftener. This entry has not yet been fully updated (first published 1897; most recently modified version published online December 2020). < n.1660
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