brachysyllabus

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

brăchysyllăbus, i, m. (sc. pes), = βραχυσύλλαβος (of short syllables);

in metre, another name of the tribrachys, ⏑ ⏑ ⏑, Diom. p. 475 P.; Mar. Vict. 2539 P.