valency

nouns

the phenomenon of forming chemical bonds

valency

is a type of (narrower)

any natural phenomenon involving chemistry (as changes to atoms or molecules)

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

valence, valency

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

valence, valency

is derived from