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[waw-ter-bed, wot-er-] /ˈwɔ tərˌbɛd, ˈwɒt ər-/
a bed having a liquid-filled rubber or plastic mattress in a rigid, often heated, waterproof frame, and providing a surface that conforms to the sleeper's body in any position.
Origin of waterbed
First recorded in 1835-45; water + bed Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Historical Examples
  • Another novel feature was in the method of controlling the depth of submergence when navigating between the surface and waterbed.

    Aircraft and Submarines Willis J. Abbot.
  • Built to further demonstrate the possibility of navigation over the waterbed of seas or the ocean.

Word Origin and History for waterbed

1610s, "a bed on board a ship," from water (n.1) + bed (n.). As a water-tight mattress filled with water, it is recorded from 1844, originally for invalids. Reinvented c.1970 as a hip furnishing.

Online Etymology Dictionary, © 2010 Douglas Harper
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