acetaminophen n : an analgesic for mild pain; also used as an antipyretic; (Datril and Tylenol and Panadol and Phenaphen and Tempra and Anacin III are trademarks of brands of acetaminophen tablets) [syn: {Datril}, {Tylenol}, {Panadol}, {Phenaphen}, {Tempra}, {Anacin III}]