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[brahy-uh-zoh-uh n] /ˌbraɪ əˈzoʊ ən/
belonging or pertaining to the Bryozoa.
Also called moss animal. any sessile marine or freshwater animal of the phylum Bryozoa, forming branching, encrusting, or gelatinous mosslike colonies of many small polyps, each having a circular or horseshoe-shaped ridge bearing ciliated tentacles, occurring on algae or on shaded objects.
Compare ectoproct, entoproct.
1870-75; Bryozo(a) + -an Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for bryozoans
  • In turn, bryozoans are preyed on by grazing organisms such as sea urchins and fish.
  • Because of their small size, bryozoans have no need of a blood system.
  • Electron diffraction studies of the calcareous skeletons of bryozoans.
British Dictionary definitions for bryozoans


any aquatic invertebrate animal of the phylum Bryozoa, forming colonies of polyps each having a ciliated feeding organ (lophophore) Popular name sea mat
of, relating to, or belonging to the Bryozoa
Popular name polyzoan, ectoproct
Word Origin
C19: from Greek bruon moss + zōion animal
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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bryozoans in Science
Any of various small aquatic invertebrate animals of the phylum Bryozoa that are capable of forming vast mosslike or branching colonies attached to seaweed or hard surfaces. Bryozoans reproduce by budding and feed on minute particles of plankton that they capture with tentacles. They are probably related to the phoronids and are the only animal phylum that does not appear in the fossil record until the early Ordovician Period.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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