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1. Any of numerous solitary or colonial hydrozoans having a polyp rather than a medusa as the dominant stage of the life cycle.
2. The asexual polyp in the life cycle of a hydrozoan.
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.
1. (Animals) of or relating to the Hydroida, an order of colonial hydrozoan coelenterates that have the polyp phase dominant
2. (Zoology) (of coelenterate colonies or individuals) having or consisting of hydra-like polyps
(Zoology) a hydroid colony or individual
[C19: from hydra + -oid]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
1. of or pertaining to the hydrozoan order Hydroidea, including hydras and marine colonial forms.n.
2. the phase of hydrozoan development that consists of polyp forms.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||hydroid - colonial coelenterates having the polyp phase dominant|
cnidarian, coelenterate - radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms
planula - the flat ciliated free-swimming larva of hydrozoan coelenterates
class Hydrozoa, Hydrozoa - coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes
hydra - small tubular solitary freshwater hydrozoan polyp
siphonophore - a floating or swimming oceanic colony of polyps often transparent or showily colored
sertularian - feathery colony of long-branched stems bearing stalkless paired polyps
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