prostomium

noun pro·sto·mi·um \prō-ˈstō-mē-əm\

plural -mia \-mē-ə\

Definition of PROSTOMIUM

: the portion of the head of an annelid worm (as an earthworm) that is situated in front of the mouth

— pro·sto·mi·al \-mē-əl\ adjective

New Latin, from Greek pro- + stoma mouth — more at stomach

First Known Use: 1870

Next Word in the Dictionary: prostrate (adjective)Previous Word in the Dictionary: prostomiateAll Words Near: prostomium

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