Source : Webster's Revised Unabridged Dictionary (1913)

Haematology \H[ae]m`a*tol"o*gy\ (? or ?), n.
   The science which treats of the blood. Same as {Hematology}.

Source : WordNet®

haematology
     n : the branch of medicine that deals with diseases of the blood
         and blood-forming organs [syn: {hematology}]