prostomium Hear it!

prostomium definition

pro·sto·mium (prō stō′mē əm)

noun pl. prostomia -·mia (-ə)

a small, noselike portion of the first body segment in many annelid worms, lying above and overhanging the mouth in earthworms

Etymology: ModL: see pro-, stoma, & -ium

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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