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trimethoprim [trahy-meth-uh-prim] WORD ORIGIN noun Pharmacology. a synthetic crystalline compound, C11H18N4O3, usually combined with a sulfonamide as an antibiotic preparation in the treatment of urinary tract infections and pneumocystis pneumonia. Liberaldictionary.com
Origin of trimethoprim 1960–65; trimetho(xyphenyl) + p(y)rim(idinediamine), components of its chemical name Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019