[ waw-ter-vas-kyuh-ler, wot-er- ]
/ ˈwɔ tərˈvæs kyə lər, ˈwɒt ər- /
a system of closed, fluid-filled tubes and ducts of echinoderms used in clinging, locomotion, feeding, and respiration.
drain the swampRead more in this article about some frequently asked questions and fun facts related to our definitions.
Cyclone, Typhoon, Hurricane: Are They All The Same?Are hurricanes, cyclones and typhoons distinct meteorological phenomena, or just different names for the same horrible type of storm? Cyclones explained Let’s start with cyclone, since it has the clearest and most precise definition of the three. A cyclone is “a large-scale, atmospheric wind-and-pressure system characterized by low pressure at its center and by circular wind motion.” And cyclones spin “counterclockwise in the Northern Hemisphere, clockwise in the Southern Hemisphere.” …
Origin of water-vascular system
First recorded in 1865–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019