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Glossary · Nouns · L

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TermTypeDefinitionClassificationsUpdated
Lymphocytopenianounan abnormally small number of lymphocytes in the circulating bloodverifiedMay 18, 2026
Lymphocytosisnounan abnormal increase in the number of lymphocytes in the circulating bloodverifiedMay 18, 2026
Lymphogranulomanounswelling of a lymph nodeverifiedMay 18, 2026
Lymphogranuloma VenereumnounMWEinfectious disease caused by a species of chlamydia bacteriumverifiedMay 18, 2026
Lymphographynounroentgenographic examination of lymph nodes and lymph vessels after injection of a radiopaque contrast mediumverifiedMay 18, 2026
Lymphoid TissuenounMWEtissue making up the lymphatic systemverifiedMay 18, 2026
Lymphokinenouna cytokine secreted by helper T cells in response to stimulation by antigens and that acts on other cells of the immune system (as by activating macrophages)verifiedMay 18, 2026
Lymphomanouna neoplasm of lymph tissue that is usually malignantverifiedMay 18, 2026
Lymphopathia VenereumnounMWEinfectious disease caused by a species of chlamydia bacteriumverifiedMay 18, 2026
Lymphopenianounan abnormally small number of lymphocytes in the circulating bloodverifiedMay 18, 2026
Lymphopoiesisnounthe formation of lymphocytes in the bone marrow and lymph nodes and thymus and spleenverifiedMay 18, 2026
Lymphurianounthe presence of lymph in the urineverifiedMay 18, 2026
Lynch LawnounMWEthe practice of punishing people by hanging without due process of lawverifiedMay 18, 2026
Lynch MobnounMWEa mob that kills a person for some presumed offense without legal authorityverifiedMay 18, 2026
Lynchingnounputting a person to death by mob action without due process of lawverifiedMay 18, 2026
Lynchpinnounpin inserted through an axletree to hold a wheel onverifiedMay 18, 2026
Lynxnounshort-tailed wildcats with usually tufted earsverifiedMay 18, 2026
Lyophilisationnouna method of drying food or blood plasma or pharmaceuticals or tissue without destroying their physical structureverifiedMay 18, 2026
Lyophilizationnouna method of drying food or blood plasma or pharmaceuticals or tissue without destroying their physical structureverifiedMay 18, 2026
Lypressinnounan antidiuretic and vasoconstrictor used to treat diabetes insipidusverifiedMay 18, 2026
Lyrate LeafnounMWEa simple leaf having curvature suggestive of a lyreverifiedMay 18, 2026
Lyrenouna harp used by ancient Greeks for accompanimentverifiedMay 18, 2026
Lyre SnakenounMWEmildly venomous snake with a lyre-shaped mark on the headverifiedMay 18, 2026
LyrebirdnounAustralian bird that resembles a pheasantverifiedMay 18, 2026
Lyreflowernoungarden plant having deep-pink drooping heart-shaped flowersverifiedMay 18, 2026
Lyric PoemnounMWEa short poem of songlike qualityverifiedMay 18, 2026
Lyricalitynounthe property of being suitable for singingverifiedMay 18, 2026
Lyricismnounthe property of being suitable for singingverifiedMay 18, 2026
Lyricistnouna person who writes the words for songsverifiedMay 18, 2026
Lyristnouna person who writes the words for songsverifiedMay 18, 2026
Lysergic AcidnounMWEa crystalline acid often used in medical researchverifiedMay 18, 2026
Lysergic Acid DiethylamidenounMWEa powerful hallucinogenic drug manufactured from lysergic acidverifiedMay 18, 2026
Lysinnounany substance (such as an antibody) or agent that can cause lysisverifiedMay 18, 2026
Lysinenounan essential amino acid found in proteinsverifiedMay 18, 2026
Lysine IntolerancenounMWEa disorder in which a lack of certain enzymes makes it impossible to digest the amino acid lysineverifiedMay 18, 2026
Lysinemianounan inborn error of metabolism in which the lack of certain enzymes leads to an inability to metabolize the amino acid lysineverifiedMay 18, 2026
Lysisnoun(biochemistry) dissolution or destruction of cells such as blood cells or bacteriaverifiedMay 18, 2026
Lysogenicitynounthe condition of a host bacterium that has incorporated a phage into its own genetic materialverifiedMay 18, 2026
Lysogenisationnounthe process by which a bacterium acquires a phage that becomes integrated into its genomeverifiedMay 18, 2026
Lysogenizationnounthe process by which a bacterium acquires a phage that becomes integrated into its genomeverifiedMay 18, 2026
Lysogenynounthe condition of a host bacterium that has incorporated a phage into its own genetic materialverifiedMay 18, 2026
Lysosomenounan organelle found in the cytoplasm of most cells (especially in leukocytes and liver and kidney cells)verifiedMay 18, 2026
Lysozymenounan enzyme found in saliva and sweat and tears that destroys the cell walls of certain bacteriaverifiedMay 18, 2026
Lyssanounan acute viral disease of the nervous system of warm-blooded animals (usually transmitted by the bite of a rabid animal)verifiedMay 18, 2026
Lyssavirusnouna neurotropic non-arbovirus of the family Rhabdoviridae that causes rabiesverifiedMay 18, 2026