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Definition of Water bed
1. Noun. A bed with a mattress made of strong plastic that is filled with water.
Generic synonyms: Bed
Definition of Water bed
1. Noun. (alternative spelling of waterbed) ¹
¹ Source: wiktionary.com
Medical Definition of Water bed
1. A mattress in the form of a closed rubber bag filled with water; used to prevent or treat pressure sores by equalizing the distribution of the patient's weight against the support. (05 Mar 2000)