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sulphanilamide (plural sulphanilamides)
- (British spelling, pharmacology) The amide of sulphanilic acid, used to treat streptococcal infections; the parent compound of the sulphonamides.
- 2001: Gerhard Domagk discovered that the red dye Prontosil is active against streptococcal infections in mice and humans. Soon afterward French workers showed that its active antibacterial agent is sulphanilamide. — Leslie Iversen, Drugs: A Very Short Introduction (Oxford 2001,page 9)