'Prostomium' definitions:
Definition of 'Prostomium'
- Prostomium \Pro*sto"mi*um\, n.; pl. Prostomia. [NL., fr. Gr. ?
before + ?, ?, mouth.] (Zool.)
That portion of the head of an annelid situated in front of
the mouth. -- {Pro*sto"mi*al}, a.
[1913 Webster]
