蓄ちく冷れい剤ざいちくれいざいMeanings1nouncold pack; ice pack; thermal gelrare termA reusable pack containing a gel or liquid that stays cold after freezing; used in coolers, lunch boxes, or for injuries. The term 保冷剤 is much more common in everyday Japanese.See also: 保冷剤蓄ちく冷れい剤ざいを冷れい凍とう庫こで凍こおらせてからクーラーボックスに入い