Containing many names or terms.In Zoöl. and botany, Specifically, noting a method of nomenclature in which the technical names of species are not confined to two terms, the generic and the specific, as they are in the binomial system of nomenclature: as, a polynomial name; a polynomial system of nomenclature: contrasted with binomial and mononomial.Also multinomial, plurinominal.A technical name consisting of more than two terms; a-polyonym.An algebraical expression consisting of two or more terms united by addition: as, Also multinomial.