- The definition of a water-vascular system is a system of fluid-filled tubes within the body of starfish and sea urchins that is used for movement and respiration.
An example of a water-vascular system is a fluid-filled canal inside a starfish that helps it move around.
water-vascular system definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
in echinoderms, a system of closed tubes and ducts filled with sea water containing some protein, and functioning variously, as in locomotion, food gathering, clinging, and respiration
water-vascular system definition by American Heritage Dictionary
A system of water-filled canals derived from the coelom that connects the tube feet of echinoderms.