Denoting the s. drugs, or sulfonamides.
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sulfonamide
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sul·fa or chiefly Brit sul·pha 'səl-fə adj
1) related chemically to sulfanilamide
2) of, relating to, employing, or containing sulfa drugs <\sulfa therapy>
sulfa or chiefly Brit sulpha n SULFA DRUG
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sul·fa (sulґfə) of, related to, or containing sulfanilamide or other sulfonamide.Medical dictionary. 2011.