prostomium(redirected from prostomia)
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n. pl. prosto·mia (-mē-ə)
The anterior portion of the head of an annelid worm, situated in front of the mouth.
pro·sto′mi·al (-əl) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
prostomiumthat part of the head of some annelids and molluscs which lies in front of the mouth.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005