Pronunciation: (sul'fu-nāt"), [key]
—n., v., -nat•ed, -nat•ing. Chem.
an ester or salt derived from a sulfonic acid.
1. to make into a sulfonic acid, as by treating an aromatic hydrocarbon with concentrated sulfuric acid.
2. to introduce the sulfonic group into (an organic compound).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.