prostomium

play
noun pro·sto·mi·um \prō-ˈstō-mē-əm\

Definition of prostomium

plural

prostomia

play \-mē-ə\
  1. :  the portion of the head of an annelid worm (such as an earthworm) that is situated in front of the mouth

prostomial

play \-mē-əl\ adjective

Origin and Etymology of prostomium

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


First Known Use: 1870


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WORD OF THE DAY

to cast off or become cast off

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