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prostomia

Variant of prostomium

noun pl. prostomia

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

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

Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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