Definition: In medicine, a hemofuscin is a type of hematopoietic cell that produces and sequesters blood cells. Hemofuscin cells are found in the bone marrow, where they produce red blood cells (erythrocytes) and platelets (plasmin). These cells help to maintain the balance of blood in the body, preventing anemia and bleeding disorders. In contrast to normal hematopoietic stem cells that produce new blood cells, hemofuscin cells