noun.
A scientist, usually a medical doctor, who specializes in hematology.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a doctor who specializes in diseases of the blood and blood-forming organs
Word Usage
"Additionally, only one in five people correctly answered that a hematologist is the type of specialist who treats blood disorders; similarly, only one in five could define hematology."