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4 definitions found
 for Dyad
From The Collaborative International Dictionary of English v.0.48 :

  Dyad \Dy"ad\, n. [L. dyas, dyadis, the number two. Gr. ?: cf. F.
     dyade. See two, and cf. Duad.]
     1. Two units treated as one; a couple; a pair.
        [1913 Webster]
  
     2. (Chem.) An element, atom, or radical having a valence or
        combining power of two.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Dyad \Dy"ad\, a. (Chem.)
     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.
     [1913 Webster]

From WordNet (r) 3.0 (2006) :

  dyad
      n 1: two items of the same kind [syn: couple, pair,
           twosome, twain, brace, span, yoke, couplet,
           distich, duo, duet, dyad, duad]

From Moby Thesaurus II by Grady Ward, 1.0 :

  21 Moby Thesaurus words for "dyad":
     both, brace, couple, couplet, distich, double harness, doublet,
     duad, duet, duo, match, mates, pair, set of two, span, team,
     the two, twain, two, twosome, yoke
  
  

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