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prostomium

[ proh-stoh-mee-uhm ]
/ proʊˈstoʊ mi əm /
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noun, plural pro·sto·mi·a [proh-stoh-mee-uh]. /proʊˈstoʊ mi ə/.
the unsegmented, preoral portion of the head of certain lower invertebrates.
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Origin of prostomium

1865–70; <New Latin <Greek prostómion mouth. See pro-2, stoma, -ium

OTHER WORDS FROM prostomium

pro·sto·mi·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use prostomium in a sentence

British Dictionary definitions for prostomium

prostomium
/ (prəʊˈstəʊmɪəm) /

noun plural -mia (-mɪə)
the lobe at the head end of earthworms and other annelids: bears tentacles, palps, etc, or forms part of a sucker or proboscis

Derived forms of prostomium

prostomial, adjective

Word Origin for prostomium

via New Latin from Greek prostomion mouth
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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