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 (to͞ob′wûrm′, tyo͞ob′-)
Any of various chiefly marine worms or wormlike invertebrates of the phyla Annelida and Phoronida that live inside tubular cases made of chitinous or calcareous secretions or of particles of sand or mud.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Animals) any of various polychaete worms that construct and live in a tube made of sand, lime, etc
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


or tube′ worm`,

any of various marine worms that produce and inhabit a tube.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
The closest comparisons available in the literature are the gastropods Alviniconcha and Ifremeria and another organism with a large trophosome, the tubeworm Riftia; these organisms all have maximum uptake rates at relatively high temperatures, closer to our experiments at 25 [degrees]C.
To sign up, and to find out more about the Capturing our Coast project, visit Invader species which are being targeted include harpoon weed, slipper limpet, Asian shore crab, creeping sea squirt, Australian tubeworm and Says mud crab.
In Virginia, areas not under clam nets were numerically dominated by the cellophane tubeworm Spiochaetopterus costarum oculatus (Webster, 1879), whereas in New Jersey ampeliscid amphipods (Ampelisca spp.) dominated these habitats.
Where necessary, encrusted material such as mussels or tubeworm conglomerates was selectively dislodged to check for underlying nests.
"But it wasn't until human eyes saw shimmering water flowing under a tubeworm 'bush' that we really understood how special Jaco Scar is," Levin added.
mangroves, as well as carbon incorporated into mollusc and tubeworm (polychaete) shells and also directly as calcium carbonate in formation of oolitic sand and beach rock--all Water Mangroves role in [check] purification retention & removal of excess nutrients & pollutants Erosion Retention of soils [check] regulation & sediments Cultural Recreation & Potential for [check] tourism recreational activities - birdwatching, kayaking etc.
The removal of the barrage will mean that congoli fish (Pseudaphritis urvilli) will once again be able migrate to the estuary to breed, and tubeworm encrustations on tortoises will also start to disappear as salinity levels drop.'
It's found in marine tubeworm cement, which indicates that the ingenuity of nature is equaled by the curiosity of biologists who ferret out interesting materials from all over the living world.
Experts also found a tubeworm at a depth of 990m on the seafloor in one part of the Gulf of Mexico.
Sections of the gravel substrate contain dense patches of sponges, hydroids, bushy and encrusting bryozoans, colonial ascidians, and the lacy tubeworm (Filograna implexa) (Collie et al., 2000a; Valentine et al., 2007).
They are built by the tubeworm serpula vermicularis, and twist upwards off the sea bed.
The photo shows a Mediterranean meadow of Posidonia oceanica with schools of fish, (sparids and serranids) and by a tubicolous polychaete, the spiral tubeworm (Spirographis spallanzani), with its branchiae extended.