Haematotic, also spelled hematotic, is a term used in medicine to refer to the production or formation of blood cells. Synonyms for this term include hematopoietic, erythropoietic, myelopoietic, and hemogenous. Hematopoietic is the most commonly used synonym, and it refers to the process of forming blood cells in the bone marrow. Erythropoietic specifically refers to the production of red blood cells, while myelopoietic refers to the formation of white blood cells, including granulocytes and monocytes. Hemogenous is a less commonly used synonym and refers to the development of blood cells outside of the bone marrow. All of these terms are used to describe the formation of blood cells, which is a vital process in maintaining a healthy body.