What is the X in X-mas?
aleukemia a·leu·ke·mi·a (ā'lōō-kē'mē-ə, āl'ōō-)
An absence of white blood cells in the blood. Usually used in reference to varieties of leukemic disease in which the blood's white cell count is normal or low but contains a few young white blood cells.
The leukemic changes in bone marrow associated with a subnormal number of white blood cells in the blood.