The spelling of the word "aleuchaemia" may appear confusing, however it is simply the result of combining two medical terms: aleukemia and anaemia. The word is pronounced /ˌæluːkiːmiəˈniːmēə/. To break it down: "aleukemia" refers to a type of leukemia in which the number of white blood cells is normal or reduced, and "anaemia" refers to a lack of red blood cells or hemoglobin in the blood. When combined, the resulting term refers to a condition that exhibits characteristics of both aleukemia and anemia.
Aleucemia.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.