eosinophilocytic leukemia a form of granulocytic leukemia in which there are conspicuous numbers of eosinophilic granulocytes in the tissues and circulating blood, or in which such cells are predominant; in chronic disease of this type, the total white blood cell count may be as high as 200,000-250,000 per mm3, with as many as 80 or 90% being eosinophils, chiefly adult forms.