Definitions for valenceˈveɪ ləns
Random House Webster's College Dictionary
the quality that determines the number of atoms or groups with which any single atom or group will unite chemically. the relative combining capacity of an atom or group compared with that of the standard hydrogen atom.
the number of binding sites on a molecule, as an antibody or antigen.
Category: Genetics, Biochemistry
Origin of valence:
1865–70; < L valentia strength, worth =valent-, s. of valēns, prp. of valēre to be strong +-ia n. suffix; see -ence
a city in SE France. 70,307.
Category: Geography (places)
(biology) a relative capacity to unite or react or interact as with antigens or a biological substrate
(chemistry) a property of atoms or radicals; their combining power given in terms of the number of hydrogen atoms (or the equivalent)
the degree of combining power of an atom (or radical) as shown by the number of atoms of hydrogen (or of other monads, as chlorine, sodium, etc.) with which it will combine, or for which it can be substituted, or with which it can be compared; thus, an atom of hydrogen is a monad, and has a valence of one; the atoms of oxygen, nitrogen, and carbon are respectively dyads, triads, and tetrads, and have a valence respectively of two, three, and four