| lambdoid suture defect | <radiology> Well-defined lucent lesion, classically unilateral, associated with neurofibromatosis (12 Dec 1998) |
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| lambert | <unit> A unit of brightness; the brightness of a perfectly diffusing surface emitting or reflecting a total luminous flux of 1 lumen per sq cm of surface. Origin: J.H. Lambert, German physicist and mathematician, 1728-1777 (05 Mar 2000) |
| lambert pine | <botany> The gigantic sugar pine of California and Oregon (Pinus Lambertiana). It has the leaves in fives, and cones a foot long. The timber is soft, and like that of the white pine of the Eastern States. Origin: So called from Lambert, an English botanist. Source: Websters Dictionary (01 Mar 1998) |
| Lambert's law | Each layer of equal thickness absorbs an equal fraction of the light that traverses it; Cf.: Beer-Lambert law. The illumination of a surface on which the light falls normally from a point source is inversely proportional to the square of the distance from the source. (05 Mar 2000) |
| Lambert's syndrome | <syndrome> A condition characterised by muscle weakness that is similar to the symptoms of myasthenia gravis. For this reason, it has been referred to as myasthenic syndrome. This disorder is caused by an insufficient release of neurotransmitter (acetylcholine) by the nerve cells. Unlike myasthenia gravis, as muscle contractions are continued, strength will increase. The cause of Lambert-Eaton syndrome is unknown, but is usually associated with small cell carcinoma of the lung or an autoimmune illness. (27 Sep 1997) |
| Lambert, Edward | <person> U.S. Physician, *1915. See: Lambert-Eaton syndrome, Eaton-Lambert syndrome. (05 Mar 2000) |
| lambert-eaton myasthenic syndrome | <neurology> An acquired autoimmune disease characterised by weakness and fatigability of proximal muscles, particularly of the pelvic girdle and thighs, with relative sparing of extraocular and bulbar muscles. It is often associated with small cell carcinoma of the lung. The neuromuscular defect in this disease is believed to be due to a deficient release of acetylcholine. (08 Mar 2000) |
| Lambert-Eaton syndrome | <syndrome> A condition characterised by muscle weakness that is similar to the symptoms of myasthenia gravis. For this reason, it has been referred to as myasthenic syndrome. This disorder is caused by an insufficient release of neurotransmitter (acetylcholine) by the nerve cells. Unlike myasthenia gravis, as muscle contractions are continued, strength will increase. The cause of Lambert-Eaton syndrome is unknown, but is usually associated with small cell carcinoma of the lung or an autoimmune illness. (27 Sep 1997) |
| lambing paralysis | A highly fatal metabolic disease of well-nourished ewes in the late stages of pregnancy, especially in ewes carrying twin lambs; it is caused by carbohydrate depletion of the blood and tissues, and is characterised by hypoglycaemia, ketonuria, fatty infiltration of the liver, rapid emaciation, coma, and a high death rate. Synonym: lambing paralysis, lambing sickness. (05 Mar 2000) |
| lambing sickness | A highly fatal metabolic disease of well-nourished ewes in the late stages of pregnancy, especially in ewes carrying twin lambs; it is caused by carbohydrate depletion of the blood and tissues, and is characterised by hypoglycaemia, ketonuria, fatty infiltration of the liver, rapid emaciation, coma, and a high death rate. Synonym: lambing paralysis, lambing sickness. (05 Mar 2000) |
| Lambl's excrescences | Small pointed projections from the edges of the aortic cusps of unknown significance. (05 Mar 2000) |
| Lamblia intestinalis | Old term for Giardia lamblia, though still frequently used, especially by protozoologists in the former Soviet Union. (05 Mar 2000) |
| lambliasis | An infection of the small intestine caused by the flagellated protozoan giardia lamblia. It is spread via contaminated food and water and by direct person-to-person contact. (12 Dec 1998) |
| lambo lambo | A disease observed in Samoa and in tropical Africa, marked by pains in the extremities, fever of a remittent or intermittent type, and abscesses in the muscles in various parts of the body (may result in death from sepsis); causative organisms are Staphylococcus aureus and Streptococcus pyogenes, but usually the disease is associated with parasitic infections. Synonym: bungpagga, lambo lambo, tropical myositis, tropical pyomyositis. (05 Mar 2000) |
| Lambrinudi | Constantine, British orthopaedic surgeon, 1890-1943. See: Lambrinudi operation. (05 Mar 2000) |