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water-vascular system

[waw-ter-vas-kyuh-ler, wot-er-] /ˈwɔ tərˈvæs kyə lər, ˈwɒt ər-/
noun, Zoology
1.
a system of closed, fluid-filled tubes and ducts of echinoderms used in clinging, locomotion, feeding, and respiration.
Origin
1865-1870
1865-70
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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