a white, crystalline drug, CHNOS, that influences the ability of the kidney to separate various compounds from the blood, used to increase the urinary excretion of uric acid in cases of gout and to decrease the urinary excretion of various medicines, esp. penicillin
See probenecid in American Heritage Dictionary 4
noun
A uricosuric drug, C13H19NO4S, derived from benzoic acid and used chiefly in the treatment of gout.