Polyvalent

Polyvalent is a synonym for multivalent and denotes something which has many values, meanings or appeals. The metaphoric origin of ~valent is derived from valency in chemistry and by metaphoric attribution, may now connote 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 and the Fe+++ cation is a trivalent or polyvalent or multivalent cation. As a result, examples of polyvalent cations include the Ca++ cation and the Fe+++ cation. {References: Since 1976, there have been 21,637 US patents issued that employ the terms polyvalent or poly-valent in connection with concepts like polyvalent cations and polyvalent ligands as disclosed above . US Patent 7,375,234 is one example of these 21,637 recent US patents.}

Specific uses may refer to:
 * Polysemy
 * Polyvalent vaccine, a vaccine that can vaccinate a person against more than one strain of a disease
 * Antivenins are classified as polyvalent when they are effective against a range of species, or several different species at the same time