{ } a. [ L. trisyllabus, Gr. &unr_;; &unr_; (see Tri-) + &unr_; a syllable: cf. F. trissyllabique. ] Of or pertaining to a trisyllable; consisting of three syllables; as, “syllable” is a trisyllabic word. -- Tris`yllab"ic*al*ly, adv. [1913 Webster]