prostomis

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

prostŏmis, ĭdis, f., = προστομίς,

an instrument to hold a horse by the nose , a barnacle , twitch , beak; trop., a drinkingvessel , Lucil. ap. Non. 1, n. 84 (others read postomis, q. v.).