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trimethoprim

[ trahy-meth-uh-prim ]

noun

, Pharmacology.
  1. a synthetic crystalline compound, C 11 H 18 N 4 O 3 , usually combined with a sulfonamide as an antibiotic preparation in the treatment of urinary tract infections and pneumocystis pneumonia.


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Word History and Origins

Origin of trimethoprim1

1960–65; trimetho(xyphenyl) + p(y)rim(idinediamine) , components of its chemical name

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trimethadionetrimethylene