trisyllabus

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

trĭsyllăbus, a, um, adj., = τρισύλλαβος,

of three syllables , trisyllabic : verbum, Varr. L. L. 9, § 91 Müll.; Mart. Cap. 5, § 522; 3, § 169.