TRIMETHOPRIM Meaning of TRIMETHOPRIM in English [ trʌɪ'mɛθə(ʊ)prɪm ]■ noun Medicine a synthetic antibiotic used to treat urinary infections.Origin1960s: from trimeth(yl) + o(xy-) + p(y)rim(idine) . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004