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.

Nearby words

  1. prostie,
  2. prostigmin,
  3. prostitute,
  4. prostitution,
  5. prostomiate,
  6. prostoon,
  7. prostrate,
  8. prostration,
  9. prostrative,
  10. prostyle

Origin of prostomium

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

Related formspro·sto·mi·al, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples 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 Formsprostomial, 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

Word Origin and History for prostomium

prostomium

n.

1870, Latinized form of Greek prostomion "fore-mouth, something before the mouth," from pro "before" (see pro-) + stoma "mouth" (see stoma).

Online Etymology Dictionary, © 2010 Douglas Harper