prostomium


pro·sto·mi·um

noun \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

Origin of PROSTOMIUM

New Latin, from Greek pro- + stoma mouth — more at stomach
First Known Use: 1870

Rhymes with PROSTOMIUM

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