sulfonamide
noun
sul·fon·amide ˌsəl-ˈfä-nə-ˌmīd 
-məd;
-ˈfō-nə-ˌmīd
: any of various amides (such as sulfanilamide) of a sulfonic acid
also : sulfa drug
Example Sentences
Recent Examples on the Web The researchers examined which children had been given prescriptions for penicillin, penicillin with B-lactamase inhibitor, cephalosporin, sulfonamide or macrolide within the first six months of life. 
Jacqueline Howard, CNN, 20 Dec. 2019 Any positive test results for sulfonamides could be the result of leftover antibiotics from that time or intentional misuse, Jonker said. Rebekah Tuchscherer, USA TODAY, 26 June 2019 Other antibiotics found to raise the risk of miscarriage include most macrolides, quinolones, tetracyclines, sulfonamides and metronidazole. Paul Sisson, sandiegouniontribune.com, 2 May 2017
Jacqueline Howard, CNN, 20 Dec. 2019 Any positive test results for sulfonamides could be the result of leftover antibiotics from that time or intentional misuse, Jonker said. Rebekah Tuchscherer, USA TODAY, 26 June 2019 Other antibiotics found to raise the risk of miscarriage include most macrolides, quinolones, tetracyclines, sulfonamides and metronidazole. Paul Sisson, sandiegouniontribune.com, 2 May 2017 Word History
Etymology
sulfonic + amide
First Known Use
1881, in the meaning defined above
Medical Definition
sulfonamide
noun
sul·fon·amide
variants or chiefly British sulphonamide
ˌsəl-ˈfän-ə-ˌmīd -məd; -ˈfō-nə-ˌmīd
-məd; -ˈfō-nə-ˌmīd : any of various amides (as sulfanilamide) of a sulfonic acid
also : sulfa drug