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• (chemistry) a property of atoms or radicals; their combining power given in terms of the number of hydrogen atoms (or the equivalent)

  synonym	valence
  derivation	valent
  attribute	monovalentmultivalentpolyvalentunivalent
  domain topic	chemical sciencechemistry
  hypernym	powerpowerfulness
  hyponym	covalencecovalency

• (biology) a relative capacity to unite or react or interact as with antigens or a biological substrate

  synonym	valence
  attribute	bivalentdoublemonovalentmultivalentpolyvalentunivalent
  domain topic	biological sciencebiology
  hypernym	powerpowerfulness

• the phenomenon of forming chemical bonds

  hypernym

  chemical phenomenon