1. (noun)hematopoiesis, haematopoiesis, hemopoiesis, haemopoiesis, hemogenesis, haemogenesis, hematogenesis, haematogenesis, sanguification the formation of blood cells in the living body (especially in the bone marrow) Synonyms: haemogenesis, haematopoiesis, hemogenesis, hemopoiesis, sanguification, haemopoiesis, hematogenesis, haematogenesis, hematopoiesis