Definitions for ice bag
Random House Webster's College Dictionary
a waterproof bag filled with ice and applied to a part of the body, as to reduce pain or swelling.
Origin of ice bag:
ice pack, ice bag(noun)
a waterproof bag filled with ice: applied to the body (especially the head) to cool or reduce swelling
A waterproof bag with a wide-mouthed stopper designed to hold ice, for service as an ice pack.