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Definition

noun

A decrease in the number of circulating white blood cells in the blood.

Supplement

Low white blood cell counts are linked with chemotherapy, radiation therapy, leukemia, and aplastic anemia.

Word origin: Greek leuco- (white) + Greek penía (poverty, need).
Related forms: leucopenic (adjective).

Variant: leukopenia

Synonym: leukocytopenia
Compare: leucocytosis