tube foot

one of numerous small, tubular processes on the ventral body surface of most echinoderms, used for locomotion and grasping.

1885–90 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
tube foot
any of numerous tubular outgrowths of the body wall of most echinoderms that are used as organs of locomotion and respiration and to aid ingestion of food

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage
Science Dictionary
tube foot  
One of the numerous external, fluid-filled muscular tubes of echinoderms, such as the starfish or sea urchin, used for locomotion, respiration, and grasping food or prey.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
In ophiuroids, an opening between the ventral arm plate and the lateral arm plate, through which a tube foot projects.
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