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sea pen

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sea pen

–noun
any of several colonial coelenterates of the genus Pennatula and related genera, having the shape of a fleshy feather.

Origin:
1755–65
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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sea pen  
n.  Any of various marine anthozoans of the families Stylatulidae and Funiculinidae, resembling and related to the sea feathers.

[From its resemblance to a quill pen.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Encyclopedia

sea pen

any of the 300 species of the order Pennatulacea, colonial invertebrate marine animals of the class Anthozoa (phylum Cnidaria). The name sea pen derives from their resemblance to quill pens. They occur in shallow and deep waters from polar seas to the tropics.

Learn more about sea pen with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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