| lactational mastitis | Mastitis, usually suppurative, occurring in the later part of the puerperium. Synonym: lactational mastitis. (05 Mar 2000) |
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| lactatriaosylceramide beta 1-3 galactosyltransferase | <enzyme> Glycolipid beta 1-3 galactosyltransferase Registry number: EC 2.4.1.- Synonym: ltc 1-3 galactosyltransferase (26 Jun 1999) |
| lacteal | 1. Pertaining to, or resembling, milk; milky; as, the lacteal fluid. 2. <anatomy> Pertaining to, or containing, chyle; as, the lacteal vessels. Origin: L. Lacteus milky, fr. Lac, lactis, milk. Cf. Galaxy, Lettuce. <anatomy> One of the lymphatic vessels which convey chyle from the small intestine through the mesenteric glands to the thoracic duct; a chyliferous vessel. Source: Websters Dictionary (01 Mar 1998) |
| lacteal cyst | A retention cyst in the mammary gland resulting from closure of a lactiferous duct. Synonym: milk cyst. (05 Mar 2000) |
| lacteal fistula | A fistulous opening into one of the lactiferous ducts. Synonym: mammary fistula. (05 Mar 2000) |
| lacteal vessel | 1. Pertaining to, or resembling, milk; milky; as, the lacteal fluid. 2. <anatomy> Pertaining to, or containing, chyle; as, the lacteal vessels. Origin: L. Lacteus milky, fr. Lac, lactis, milk. Cf. Galaxy, Lettuce. <anatomy> One of the lymphatic vessels which convey chyle from the small intestine through the mesenteric glands to the thoracic duct; a chyliferous vessel. Source: Websters Dictionary (01 Mar 1998) |
| lactean | 1. Milky; consisting of, or resembling, milk. "This lactean whiteness." 2. <anatomy> Lacteal; conveying chyle. See: Lacteal. Source: Websters Dictionary (01 Mar 1998) |
| lactenin | An antibacterial agent active against streptococci isolated from cow's milk. (05 Mar 2000) |
| lactescence | 1. The state or quality of producing milk, or milklike juice; resemblance to milk; a milky colour. "This lactescence does commonly ensue when . . . Fair water is suddenly poured upon the solution." (Boyle) 2. <botany> The latex of certain plants. See Latex. Origin: Cf. F. Lactescence. Source: Websters Dictionary (01 Mar 1998) |
| lactescent | 1. Having a milky look; becoming milky. 2. <botany> Producing milk or a milklike juice or fluid, as the milkweed. See Latex. Origin: L. Lactescens, p. Pr. Of lactescere to turn to milk, incho. Fr. Lactere to be milky, fr. Lac, lactis, milk: cf. F. Lactescent. Source: Websters Dictionary (01 Mar 1998) |
| lactic | <physiology> Of or pertaining to milk; procured from sour milk or whey; as, lactic acid; lactic fermentation, etc. <biochemistry, physiology> Lactic acid, a sirupy, colourless fluid, soluble in water, with an intensely sour taste and strong acid reaction. There are at least three isomeric modifications all having the formula C3H6O3. Sarcolactic or paralactic acid occurs chiefly in dead muscle tissue, while ordinary lactic acid results from fermentation. The two acids are alike in having the same constitution (expressed by the name ethylidene lactic acid), but the latter is optically inactive, while sarcolactic acid rotates the plane of polarization to the right. The third acid, ethylene lactic acid, accompanies sarcolactic acid in the juice of flesh, and is optically inactive. Lactic ferment, an organised ferment (Bacterium lacticum or lactis), which produces lactic fermentation, decomposing the sugar of milk into carbonic and lactic acids, the latter, of which renders the milk sour, and precipitates the casein, thus giving rise to the so-called spontaneous coagulation of milk. Lactic fermentation. See Fermentation. Origin: L. Lac, lactis, milk: cf. F. Lactique. See Lacteal, and cf. Galactic. Source: Websters Dictionary (01 Mar 1998) |
| lactic acid | A byproduct of carbohydrate metabolism (anaerobic metabolism). A lactic acid level may be measured in the bloodstream in conditions of metabolic acidosis. Lactic acid is an intermediate product of carbohydrate metabolism and is derived mainly from muscle cells and red blood cells. Exercise will normally raise lactic acid levels. Conditions of oxygen deprivation (for example shock, heart failure, lung disease) will trigger anaerobic metabolism within muscle tissue resulting in lactic acid build up in the tissues. Normal lactic acid levels are 4.5 to 19.8 mg/dl. (25 Jun 1999) |
| lactic acid bacillus | A member of the genus Lactobacillus. (05 Mar 2000) |
| lactic acid bacteria | <microbiology> A group of Gram-positive, non-sporing bacteria which carry out a lactic acid fermentation of sugars. It includes species of Lactobacillus, Leuconostoc, Pediococcus and Streptococcus. See: lactic acid fermentation. (25 Jun 1999) |
| lactic acid dehydrogenase | <enzyme> An enzyme with 5 forms: LDH-1 is in the heart, its blood level can rise when heart muscle is damaged. Other forms can be found in the liver, brain, kidney, skeletal muscle and bone. A useful blood test in the evaluation of many disease processes, including heart attack, liver disease, muscular dystrophy and bone disease. (27 Sep 1997) |