trimethoprim

[trahy-meth-uh-prim]
noun Pharmacology.
  1. a synthetic crystalline compound, C11H18N4O3, usually combined with a sulfonamide as an antibiotic preparation in the treatment of urinary tract infections and pneumocystis pneumonia.

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. 2018