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dyad noun

  /ˈdaɪ.æd/
  • A set of two elements treated as one; a pair.
  • (music) Any set of two different pitch classes.
 двойка, чифт
  • (chemistry) An element, atom, or radical having a valence of or combining power of two.
 двувалентен елемент
  • (biology) A secondary unit of organisation consisting of an aggregate of monads.
 чифт
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