| eukaryote | (noun) an organism with cells characteristic of all life forms except primitive microorganisms such as bacteria; i.e. an organism with `good' or membrane-bound nuclei in its cells | Synonyms: eucaryote |
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| eukaryotic | (adjective) having cells with `good' or membrane-bound nuclei | Synonyms: eucaryotic |
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| interleukin | (noun) any of several lymphokines that promote macrophages and killer T cells and B cells and other components of the immune system | - |
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| leukaemia | (noun) malignant neoplasm of blood-forming tissues; characterized by abnormal proliferation of leukocytes; one of the four major types of cancer | Synonyms: cancer of the blood, leucaemia, leukemia |
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| leukemia | (noun) malignant neoplasm of blood-forming tissues; characterized by abnormal proliferation of leukocytes; one of the four major types of cancer | Synonyms: cancer of the blood, leucaemia, leukaemia |
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| leukocyte | (noun) blood cells that engulf and digest bacteria and fungi; an important part of the body's defense system | Synonyms: leucocyte, WBC, white blood cell, white blood corpuscle, white cell, white corpuscle |
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| leukocytosis | (noun) an abnormal increase in the number of white blood cells in the blood as a result of infection (as in leukemia) | Synonyms: leucocytosis |
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| leukoderma | (noun) a congenital skin condition characterized by spots or bands of unpigmented skin | - |
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| leukoencephalitis | (noun) inflammation of the white matter of the brain | - |
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| leukoma | (noun) eye disease consisting of an opaque white spot on the cornea | Synonyms: leucoma |
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| leukopenia | (noun) an abnormal lowering of the white blood cell count | Synonyms: leucopenia |
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| leukorrhea | (noun) discharge of white mucous material from the vagina; often an indication of infection | Synonyms: leucorrhea |
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| leukotomy | (noun) surgical interruption of nerve tracts to and from the frontal lobe of the brain; often results in marked cognitive and personality changes | Synonyms: frontal lobotomy, leucotomy, lobotomy, prefrontal leucotomy, prefrontal leukotomy, prefrontal lobotomy |
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