prostomium

[ proh-stoh-mee-uh m ]
/ proʊˈstoʊ mi əm /

noun, plural pro·sto·mi·a [proh-stoh-mee-uh] /proʊˈstoʊ mi ə/.

the unsegmented, preoral portion of the head of certain lower invertebrates.

QUIZZES

HEED THE VOX POPULI, AND TAKE THIS WORD OF THE DAY QUIZ!

Test your memory on these verbal firecrackers from the week of June 29 to July 5!
Question 1 of 7
anchorite

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. 2020

Example sentences from the Web for prostomium

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