- a bag, usually of rubber, for holding hot water to apply warmth to some part of the body, as the feet.
Also called hot-water bottle.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for hot-water bottle
- a receptacle, now usually made of rubber, designed to be filled with hot water, used for warming a bed or parts of the body