phenazone
/ˈfiːnəzəʊn/ /ˈfɛnəzəʊn/noun
1 Chemistry. A crystalline, tricyclic, heteroaromatic compound; 9,10-diazaphenanthrene, C12H8N2. Now rare.
2 Pharmacology. An analgesic and antipyretic drug, also called antipyrin.
- Chemical name: 1,5-dimethyl-3-phenyl-pyrazolone, C11H12N2O..
Origin
Late 19th century; earliest use found in Journal of the Chemical Society. From pheno- + azo- + -one.