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sulphonamide

British  
/ sʌlˈfɒnəˌmaɪd /

noun

  1. any of a class of organic compounds that are amides of sulphonic acids containing the group –SO 2 NH 2 or a group derived from this. An important class of sulphonamides are the sulfa drugs

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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By the action of ammonia, p-toluene sulphonamide is produced and is subsequently oxidised by bichromate and sulphuric acid to p-sulphonamidobenzoic acid.

From Project Gutenberg

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.