sertularian

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ser·tu·lar·i·an

(sûr′chə-lâr′ē-ən, sûr′tl-âr′-)

Any of various colonial hydroids of the genus Sertularia, having stalkless polyps arranged in pairs along a branching stem.

[From New Latin Sertulāria, genus name, from Latin sertula, diminutive of serta, garland, from feminine past participle of serere, to join; see ser- in Indo-European roots.]

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.

sertularian

(ˌsɜːtjʊˈlɛərɪən)

(Zoology) any of various hydroid coelenterates of the genus Sertularia, forming feathery colonies of long branched stems bearing stalkless paired polyps

[C18: from New Latin Sertulāria, from Latin sertula diminutive of serta a garland]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

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Noun

sertularian - feathery colony of long-branched stems bearing stalkless paired polyps

hydroid, hydrozoan - colonial coelenterates having the polyp phase dominant

genus Sertularia, Sertularia - sessile hydroid that forms feathery colonies

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This species is always contained within the outer chitinous layer of a marine sertularian hydroid.