Category: L
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Lysophospholipase
An enzyme that catalyzes the hydrolysis of a single fatty acid ester bond in lysoglycerophosphatidates with the formation of glyceryl phosphatidates and a fatty acid.
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Lysine
An essential amino acid. It is often added to animal feed. An essential amino acid of special nutritional importance, since it is the limiting amino acid in many cereals. An essential, basic amino acid obtained from many proteins by hydrolysis. One of the essential amino acids, frequently marginal or deficient in cereal-based diets of poor…
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Lymphoid
Referring to lymphocytes, a type of white blood cell. Also refers to tissue in which lymphocytes develop. Pertaining to the lymphatic system. Referring to lymph, lymphatic tissue, or the lymphatic system. The tissues associated with the lymphatic system. An ethereal, pale-yellow fluid known as lymph circulates throughout the entirety of the body. The lymphatic system…
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Lymphocyte count
A count of the number of lymphocytes in the blood.
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Lymphatic system
The tissues and organs that produce, store, and carry white blood cells that fight infection and other diseases. This system includes the bone marrow, spleen, thymus, lymph nodes and a network of thin tubes that carry lymph and white blood cells. These tubes branch, like blood vessels, into all the tissues of the body. This…
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Lymphatic
The tissues and organs, including the bone marrow, spleen, thymus, and lymph nodes, that produce and store cells that fight infection and disease. Pertaining to the lymph system or lymph tissue, the “back alley” of blood circulation. Lymph is the alkaline, clear intercellular fluid that drains from the blood capillaries, where the arterial blood separates…
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Lymphadenitis
Inflammation of the lymph nodes and glands; it usually occurs as a result of systemic neoplastic disease, bacterial infection, or inflammatory condition. An inflammation of one or more lymph nodes that may be caused by infection with bacteria, viruses, fungi, or other microorganisms that produce disease. Lymphadenitis occurs when these microorganisms are trapped in the…
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Lymph node
A rounded mass of lymphatic tissue that is surrounded by a capsule of connective tissue. Also known as a lymph gland. Lymph nodes are spread out along lymphatic vessels and contain many lymphocytes, which filter the lymphatic fluid (lymph). Any of the small structures that filter lymph and contain lymphocytes. Lymph nodes are concentrated in…
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Lymph
The almost colorless fluid that travels through the lymphatic system and carries cells that help fight infection and disease. The fluid between blood and the tissues in which oxygen and nutrients are transported to the tissues, and waste products back to the blood. A pale fluid containing white blood cells and other substances that bathes…
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Lucida
An instrument, invented by Wollaton, consisting essentially of a prism or a mirror through which an object can be viewed so as to appear on a plane surface seen in direct view and on which the outline of the object may be traced.