from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. One of the numerous external, fluid-filled muscular tubes of echinoderms, such as the starfish or sea urchin, serving as organs of locomotion, food handling, and respiration.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A locomotor appendage of an echinoderm consisting of a tube with longitudinal muscles, pressurized by water.

from the GNU version of the Collaborative International Dictionary of English

  • n. one of the ambulacral suckers of an echinoderm.

from The Century Dictionary and Cyclopedia

  • n. One of the numerous tubular locomotory pedicels of the ambulacra of echinoderms, as star-fishes and sea-urchins; a water-foot.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. tentacular tubular process of most echinoderms (starfish and sea urchins and holothurians) having a sucker at the end and used for e.g. locomotion and respiration


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