LATIN DICTIONARYLexicon Latīnum
noun

postŏmis

Meaning

  1. a barnacle

postŏmis, ĭdis, f. perh. from πρόστομος,
I. a barnacle, twitch, an instrument fixed upon the nostrils of unruly horses; hence, transf., a drinking-cup, from its being always at a tippler's nose (anteclass.), Lucil. ap. Non. 22, 27 (al. prostomides): postomis, ἐπιστομίς, Gloss. Lat. Gr.

Quick answers

What does postŏmis mean in Latin?
postŏmis, a noun, means “a barnacle”.