acetylsalicylic acid Meaning, Definition & Usage

  1. noun 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
    Empirin; St. Joseph; Bayer; aspirin.

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