DYAD

couple, pair, twosome, twain, brace, span, yoke, couplet, distich, duo, duet, dyad, duad

(noun) two items of the same kind

Source: WordNet® 3.1

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Etymology

Noun

dyad (plural dyads)

A set of two elements treated as one; a pair.

Synonyms: couple, duad, Thesaurus:duo

(music) Any set of two different pitch classes.

A pair of things standing in particular relation; dyadic relation.

• "For each individual in a specific dyad (i.e, mother-offspring, offspring-father, sibling-sibling),..." Debra Lieberman, John Tooby, and Leda Cosmides - The evolution of human incest avoidance mechanisms: an evolutionary psychological approach, p. 20

(chemistry) An element, atom, or radical having a valence or combining power of two.

(biology) A secondary unit of organisation consisting of an aggregate of monads.

(mathematics) A tensor of order two and rank one.

Coordinate terms

• monad · duad, dyad · triad · tetrad · pentad · hexad · heptad · octad · ennead, nonad · decad, decade · hendecad · dodecad, duodecade

Anagrams

• Addy, D-Day, Dady, addy

Source: Wiktionary

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Dy"ad, n. Etym: [L. dyas, dyadis, the number two. Gr. dyade. See two, and cf. Duad.]

1. Two units treated as one; a couple; a pair.

2. (Chem.)

Definition: An element, atom, or radical having a valence or combining power of two.

Dy"ad, a. (Chem.)

Definition: Having a valence or combining power of two; capable of being substituted for, combined with, or replaced by, two atoms of hydrogen; as, oxygen and calcium are dyad elements. See Valence.

Source: Webster’s Unabridged Dictionary 1913 Edition

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