e·ryth·ro·poi·e·tin 
(ĭ-rĭth′rō-poi-ētĭn)
(ĭ-rĭth′rō-poi-ētĭn)n.
1. A glycoprotein hormone that stimulates the production of red blood cells by stem cells in bone marrow. Produced mainly by the kidneys, it is released in response to decreased levels of oxygen in body tissue.
2. Epoetin alfa.
[ERYTHROPOIET(IC) + -IN.]