the acetylated derivative of salicylic acid; used as an analgesic anti-inflammatory drug (trade names Bayer, Empirin, and St. Joseph) usually taken in tablet form; used as an antipyretic; slows clotting of the blood by poisoning platelets

[ Syn: aspirin , aspirin , acetylsalicylic acid , acetylsalicylic acid , bayer , bayer , empirin , empirin , st. joseph , st. joseph ]