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water-vascular system

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

First recorded in 1865–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018