Prostomial

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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]