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personal flotation device

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noun
  1. a life preserver, life jacket, or other device for keeping a person afloat in the water. Abbreviation: PFD

Origin of personal flotation device

First recorded in 1970–75
Also called flo·ta·tion dev·ice.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018