Category: L
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Linea costoarticularis
A line between the sternoclavicular articulation and the point of the 11th rib.
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Linea aspera
A longitudinal ridge on the posterior surface of the middle third of the femur.
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Linea albicantes
Lines seen on the abdomen, buttocks, and breasts, frequently caused by pregnancy, obesity, or prolonged adrenal cortical hormone therapy but may occur as the result of abdominal distention from any cause.
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Line of Owen
Occasional prominent growth lines or bands in the dentin of a tooth. They provide a record of the growth of the coronal or radicular dentin.
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Lateral supracondylar line
One of two ridges on the posterior surface of the distal end of the femur, formed by diverging lips of the linea aspera. It is one of the proximal attachments of the vastus lateralis muscle of the quadriceps.
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Line of fixation
An imaginary line drawn from the subject viewed to the fovea centralis.
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Line of demarcation
A line of division between healthy and diseased tissue. Visible line separating colored hair from new growth, an obvious line where foundation starts or stops.
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Limulus amebocyte lysate test
A test used to detect minute quantities of bacterial endotoxins and to test for pyrogens in various materials; it is also used to detect septicemia due to gram-negative bacteria. Limulus amebocyte lysate is formed from the lysed circulating amebocytes of the horseshoe crab (Limulus polyphemus).
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Limonene
An essential oil derived from orange or lemon peel. It is used as a flavoring agent in cough syrups.
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Limnology
The scientific study of fresh water in the environment (i.e., potability, pH, degree of pollution, mineral content, and variation with seasonal and climatic changes).