trinomial >> trʌɪˈnəʊmɪəl
Definition: [adjective] (of an algebraic expression) consisting of three terms.
Definition: [adjective] (of a taxonomic name) consisting of three terms where the first is the name of the genus, the second that of the species, and the third that of the subspecies or variety.
Definition: [noun] an algebraic expression of three terms.
Definition: [noun] a trinomial taxonomic name.