fu·ro·se·mide \f(y)əˈrōsəˌmīd\noun alsofur·se·mide\ˈfərsə-, ˈfə̄sə-\ (-s) Etymology: International Scientific Vocabulary fur- + sulf- + -emide, probably alteration of amide : a powerful diuretic C12H11ClN2O5S used especially in the treatment of edema