cephalateZool.|ˈsɛfələt| [f.Gr. κεϕαλή + -ate2. Cf. F. céphaléadj.] A mollusc having a distinct head, or belonging to the Encephalous division (Cephalata). 1862Dana Man.Geol. 155 The ordinary Mollusks are usually divided into..The Cephalates, having a head.