Polyvalent is a synonym for multivalent and denotes something which has many values, meanings or appeals. The metaphoric origin of is derived from valency in chemistry and by metaphoric attribution, may now a "subtle, polyvalent allegory". In chemistry the terms polyvalent or multivalent can be used to refer to species which are not univalent or monovalent. For example, the Cs+ cation is a univalent or monovalent cation, whereas the Ca++ cation is a divalent or polyvalent or multivalent cation a… (More on Polyvalent)