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1. The study of blood, the blood-forming organs, and blood diseases. Hematology includes the study of etiology, diagnosis, treatment, prognosis, and prevention of blood diseases that affect the production of blood and its components, such as blood cells, hemoglobin, blood proteins, and the mechanism of coagulation. (

2. Branch of Biology that deals the study of blood and blood – forming organs. (

3. A sub-specialty of Internal Medicine concerned with morphology, Physiology, and Pathology of the Blood and Blood-forming Tissues. (


Word origin: From the Greek αἷμα haima “blood” and -λoγία

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