prostomium
the unsegmented, preoral portion of the head of certain lower invertebrates.
Origin of prostomium
1Other words from prostomium
- pro·sto·mi·al, adjective
Words Nearby prostomium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use prostomium in a sentence
prostomium wider than long, deeply bilobed, the median tentacle inserted deeply in the intervening incision.
prostomium shortly subcordate, well rounded in front, incurved caudally.
prostomium generally small, sometimes prolonged, but never bearing tentacles or processes.
prostomium: The region in front of the mouth; the preoral part of the head.
The Sea-beach at Ebb-tide | Augusta Foote Arnoldprostomium of usual general form; consisting of fourteen or fifteen rings.
British Dictionary definitions for prostomium
/ (prəʊˈstəʊmɪəm) /
the lobe at the head end of earthworms and other annelids: bears tentacles, palps, etc, or forms part of a sucker or proboscis
Origin of prostomium
1Derived forms of prostomium
- prostomial, adjective
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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