Abnormal decrease in the number of leukocytes in the blood (white blood cells that help to combat infection). ... (16 Dec 1997) ... 
(loo″ko-si″to-pe´ne-ә) leukopenia.
Type: Term Pronunciation: lū′kō-sī′tō-pē′nē-ă Synonyms: leukopenia
leukocytopenia, leukopenia, leukopenic, leucopenic The antithesis of leukocytosis; any situation in which the total number of leukocytes in circulating blood that is less than normal, the lower limit of which is generally regarded as 40005000 per cu mm.