hy·drox·y·u·re·a 
(hī-drŏk′sē-y-rēə)
(hī-drŏk′sē-y-rēə)n.
An antineoplastic drug, CH4N2O2, that suppresses the production of blood cell precursors in the bone marrow and is used in the treatment of certain leukemias, carcinomas, and sickle cell anemia.