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n. pl. vi·brac·u·la (-lə)
One of the long bristlelike zooids of a bryozoan, which move in a whiplike manner.

[New Latin vibrāculum, from Latin vibrāre, to shake; see vibrate.]

vi·brac′u·lar (-lər) adj.
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.


(vaɪˈbrækjʊləm) or


n, pl -la (-lə)
(Zoology) zoology any of the specialized bristle-like polyps in certain bryozoans, the actions of which prevent parasites from settling on the colony
[C19: from New Latin, from Latin vibrāre to brandish]
viˈbracular adj
viˈbracuˌloid adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
neritina lacks the mechanical defense of specialized zooids called avicularia and vibracula, which are present in many other bryozoan species.