ice pack

large masses of ice floating together; bag containing ice (for lowering a fever, reducing swelling, etc.)

This article is about a sac filled with a coolant. For sea ice, such as Arctic ice packs, see Pack ice An ice pack (commonly used therapeutically) is a plastic sac of crushed or cubed ice, refrigerant gel or liquid, or even frozen vegetables. This refrigerant, usually non-toxic, can absorb a lot of heat, since its specific heat is very high.
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Ice pack n. A folded sac filled with crushed ice and applied to sore or swollen parts of the body to reduce pain and inflammation. [more]Ice pack - Community and Resources

Noun
1. a large expanse of floating ice
(synonym) pack ice
(hypernym) ice

Noun
1. a waterproof bag filled with ice: applied to the body (especially the head) to cool or reduce swelling
(synonym) ice bag
(hypernym) bag

Synonyms and related words:
Dry Ice, air cooler, berg, calf, chiller, cold pack, cooler, cryosphere, fan, firn, floe, frazil, frozen water, glaciation, glacier, glacieret, glaze, glazed frost, granular snow, ground ice, growler, ice, ice bag, ice banner, ice barrier, ice belt, ice bucket, ice cave, ice cube, ice cubes, ice dike, ice field, ice floe, ice foot, ice front, ice island, ice needle, ice pail, ice pinnacle, ice raft, ice sheet, iceberg, icefall, icequake, icicle, jokul, lolly, neve, nieve penitente, pack ice, serac, shelf ice, sleet, slob, sludge, snow ice, snowberg, surface cooler, ventilator, water cooler, wine cooler