<haematology> An acute or chronic disease of unknown cause in man and other warm blooded animals that involves the blood forming organs, is characterised by an abnormal increase in the number of leucocytes in the tissues of the body with or without a corresponding increase of those in the circulating blood and is classified according of the type leucocyte most prominently involved.

This entry appears with permission from the Dictionary of Cell and Molecular Biology

American spelling: leukemia

(11 Mar 2008)