| LS | lateral suspensor; left sacrum; left septum; left side; legally separated; leiomyosarcoma; length of... |
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| LSD | laryngeal sound discrimination; least significant difference; least significant digit; low-sodium di... |
| VLCD | very low calorie diet |
| LBP | lipopolysaccharide-binding protein; low back pain; low blood pressure; lumbar back pain |
| MAP | malignant atrophic papulosis; mandibular angle plane; maturation-activated protein; maximal aerobic ... |
| low flow principle | A principle based on the observation that animals can survive prolonged vena caval occlusion without sequelae: if blood from the azygos vein alone is permitted to enter the heart, patients are perfused during cardiac and pulmonary bypass at flows much less than the normal resting cardiac output. Synonym: low flow principle. (05 Mar 2000) |
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| low forceps delivery | Delivery by forceps applied to the foetal head after it is clearly visible, the skull has reached the perineal floor, and plus 2 (+2) station. This classification of forceps delivery may be with or without rotation of the foetal head. (05 Mar 2000) |
| low frequency transduction | Specialised transduction in which only a small portion of the prophage particles, because of their defectiveness, are able to develop sufficiently to serve as effective transducing agents. (05 Mar 2000) |
| Low, George | <person> English physician, 1872-1952. See: Castellani-Low sign. (05 Mar 2000) |
| low grade astrocytoma | <tumour> Astrocytoma characterised by an increased cellularity of uneven distribution and mild nuclear pleomorphism. (05 Mar 2000) |
| low lip line | The lowest position of the lower lip during the act of smiling or voluntary retraction, the lowest position of the upper lip at rest. (05 Mar 2000) |
| low malignant potential tumour | A neoplasm of the ovary, usually arising in young women, composed of complex epithelial hyperplasia without stromas invasion; may recur if incompletely removed surgically, but is clinically less aggressive than carcinoma. Synonym: low malignant potential tumour. (05 Mar 2000) |
| low-necked | Cut low in the neck; decollete; said of a woman's dress. Source: Websters Dictionary (01 Mar 1998) |
| low output failure | Heart failure in which the cardiac output is subnormal, as is usually seen in failure due to coronary, hypertensive, or valvular heart disease. (05 Mar 2000) |
| low-pass filter | A device or material with the opposite effect from a high-pass filter; most tissues act as low-pass filters of ultrasound signals. (05 Mar 2000) |
| low placenta | Location of the placenta in the lower part of the uterus (womb) so that the placenta partially or completely covers the cervix. Also known as a placenta previa. (12 Dec 1998) |
| low platelet count | <haematology> An abnormally low platelet count. Normal platelet counts are 150,000-400,000 per cubic millimetre. Those with low platelet counts may exhibit haematuria, haematemesis, easy bruising, bleeding gums, melena (blood in stools), prolonged menses or nosebleeds. Spontaneous intracranial haemorrhage can occur with platelet counts of 10-15,000 (or less). (27 Sep 1997) |
| low-pressure | Having, employing, or exerting, a low degree of pressure. Low-pressure steam engine, a steam engine in which low steam is used; often applied to a condensing engine even when steam at high pressure is used. See Steam engine. Source: Websters Dictionary (01 Mar 1998) |
| low-set ear | An ear positionned below its normal location. Classified as a minor anomaly. Technically, the ear is low-set when the helix (of the ear) meets the cranium at a level below that of a horizontal plane through both inner canthi (the inside corners of the eyes). The presence of 2 or more minor anomalies in a child increases the probability that the child has a major malformation. (12 Dec 1998) |
| low sodium syndrome | <syndrome> A syndrome resulting from salt restriction and use of diuretics in treatment of congestive heart failure and hypertension, characterised by weakness, drowsiness, muscle cramps, and a reduction in glomerular filtration with consequent nitrogen retention, renal failure, and sometimes death; occurs also in cirrhosis of the liver with ascites and in adrenal insufficiency. Synonym: salt depletion syndrome. (05 Mar 2000) |