bĭnōmĭnis, e, adj. [bis-nomen, analog. to cognominis, from con-nomen], having two names (only in Ov. and in gen. sing.): binominis, cui geminum est nomen, ut Numa Pompilius, Tullus Hostilius, Paul. ex Fest. p. 36 Müll.: Ascanius (also called Iulus), Ov. M. 14, 609: Ister (also called Danubius), id. P. 1, 8, 11; id. Ib. 415.