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3 definitions found
 for valency
From The Collaborative International Dictionary of English v.0.48 :

  Valency \Val"en*cy\, n.; pl. Valencies. (Chem.)
     (a) See Valence.
     (b) A unit of combining power; a so-called bond of affinity.
         [1913 Webster]

From WordNet (r) 3.0 (2006) :

      n 1: the phenomenon of forming chemical bonds
      2: (biology) a relative capacity to unite or react or interact
         as with antigens or a biological substrate [syn: valence,
      3: (chemistry) a property of atoms or radicals; their combining
         power given in terms of the number of hydrogen atoms (or the
         equivalent) [syn: valence, valency]

From The Free On-line Dictionary of Computing (30 December 2018) :

     The degree (or valency) of a node in a graph is the number of
     edges joined to it.

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