noun Medicine/Medical.
a decrease in the number of white blood cells in the blood.
Also, leucopenia.
Also called leukocytopenia [loo-kuh-sahy-tuh-pee-nee-uh] .

1895–1900; < Neo-Latin leucopenia, equivalent to leuco- leuko- + Greek penía poverty, akin to pénesthai to be poor, toil; see -ia

leukopenic, adjective
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World English Dictionary
leucopenia or leukopenia (ˌluːkəʊˈpiːnɪə)
pathol an abnormal reduction in the number of white blood cells in the blood, characteristic of certain diseases
[C19: from leuco- + Greek penia poverty]
leukopenia or leukopenia
[C19: from leuco- + Greek penia poverty]
leuco'penic or leukopenia
leuko'penic or leukopenia

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

leukopenia leu·ko·pe·ni·a or leu·co·pe·ni·a (lōō'kə-pē'nē-ə)
An abnormally low number of white blood cells in the circulating blood. Also called leukocytopenia.

leu'ko·pe'nic adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica


abnormally low number of white blood cells (leukocytes) in the blood circulation, defined as less than 5,000 leukocytes per cubic millimetre of blood. Leukopenia often accompanies certain infections, especially those caused by viruses or protozoans. Other causes of the condition include the administration of certain drugs (e.g., analgesics, antihistamines, and anticonvulsants), debilitation, malnutrition, chronic anemias, some spleen disorders, agranulocytosis, lupus erythematosus, and anaphylactic shock.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences for leukopenia
Leukopenia and neutropenia due to splenomegaly with splenic margination.
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