ˌsəlfəˈniləˌmīd, -_mə̇d noun
Etymology: sulfanil ic + amide
1. : a crystalline sulfonamide H 2 NC 6 H 4 SO 2 NH 2 that is made usually by the action of ammonia and then alkali on N -acetyl-sulfanilyl chloride, that is the parent compound of most of the sulfa drugs, and that is used less than sulfadiazine and other sulfa drugs : the amide of sulfanilic acid
2. : a derivative of sulfanilamide ; especially : sulfa drug