sul·fon·a·mide (sŭl-fŏnə-mīd′, -mĭd)
1. Any of a group of organic sulfur compounds containing the radical SO2NH2 and including the sulfa drugs.
2. See sulfa drug.
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Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.