Definition of phenazone in US English:

phenazone

noun

  • 1Chemistry. A crystalline, tricyclic, heteroaromatic compound; 9,10-diazaphenanthrene, C₁₂H₈N₂. Now rare.

  • 2Pharmacology. An analgesic and antipyretic drug, also called antipyrin.

Origin

Late 19th century; earliest use found in Journal of the Chemical Society. From pheno- + azo- + -one.