Category: L
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Levothyroxine sodium
Compund used in thyroid hormone replacement. The sodium salt of the natural isomer of thyroxine used to treat thyroid deficiency. A typical dosage is 1.6 mcg/kg/day given orally.
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Levetiracetam
An anticonvulsant; antiepileptic.
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lesion-causing bacterial toxins
Bacteria that produce toxins that in turn cause lesions. Bacillus cereus are gram-positive, rod-shaped, spore-forming, aerobic bacteria, which produce enterotoxins (type I and II) as well as several enzymes of pathogenic relevance (e.g., hemolysin and lecithinase).
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Lard
Pig fat. Purified fat from the hog. The sole nutrient is fat; a 100-g portion contains 902 kcal. The fatty tissue of swine that has undergone a process of melting and purification; predominantly utilized in certain pastry dishes. This substance appears as a white, non-transparent solid that carries an almost imperceptible scent. The highest quality…
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Lactoflavin
An outdated name for riboflavin (vitamin B2).
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Lactalbumin
One of the whey proteins in milk. A milk protein present in milk at a lower concentration than casein. Unlike casein, it is not precipitated from milk under acid conditions; it is therefore a constituent of cheese made from whey rather than curd. The albumin found in milk and other dairy products.
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Labetalol hydrochloride
An a and p blocker; an antihypertensive agent.
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Limbal clearance
Clearance of the limbal area when a scleral contact lens is fitted.
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Lenticular lens
A lens having the power ground only in the central portion of the lens in order to reduce thickness and weight (either a spectacle lens or a contact lens).
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Laparoscopic surgery
A newer means of performing operations that utilizes very small incisions through which instruments called laparoscopes are passed, allowing the surgeon to see, cut, and sew without requiring a large incision. An operation performed under general anesthesia with the use of a fiberoptic device called a laparoscope (a viewing tube), which projects images onto a…