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2. something having this effect, such as a cold pack, aspirin, or quinine; antipyretic drugs dilate the blood vessels near the surface of the skin, thereby allowing more blood to flow through the skin, where it can be cooled by the air. An antipyretic can also increase perspiration, the evaporation of which cools the body. Called also febricide and febrifuge.
lowering bodily temperature; an agent that so acts.