water vascular system

wa·ter-vas·cu·lar sys·tem

[waw-ter-vas-kyuh-ler, wot-er-]
noun Zoology.
a system of closed, fluid-filled tubes and ducts of echinoderms used in clinging, locomotion, feeding, and respiration.

Origin:
1865–70

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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WordNet
water vascular system

noun
system of fluid-filled tubes used by echinoderms in locomotion and feeding and respiration 
WordNet® 3.0, © 2006 by Princeton University.
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00:10
Water vascular system is always a great word to know.
So is lollapalooza. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
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