Source : WordNet®

acetylsalicylic acid
     n : the acetylated derivative of salicylic acid; used as an
         analgesic anti-inflammatory drug (trade names Bayer and
         Empirin) usually taken in tablet form; used as an
         antipyretic; slows clotting of the blood by poisoning
         platelets [syn: {aspirin}, {Bayer}, {Empirin}]