| brown | Of a dark colour, of various shades between black and red or yellow. "Cheeks brown as the oak leaves." (Longfellow) Brown Bess, the old regulation flintlock smoothbore musket, with bronzed barrel, formerly used in the British army. Brown bread Dark coloured bread; especially. A kind made of unbolted wheat flour, sometimes called in the United States Graham bread. "He would mouth with a beggar though she smelt brown bread and garlic." . Dark coloured bread made of rye meal and Indian meal, or of wheat and rye or Indian; rye and Indian bread. Brown coal, wood coal. See Lignite. Brown hematite or Brown iron ore, a ferruginous variety of dolomite, in part identical with ankerite. Brown stone. See Brownstone. Brown stout, a strong kind of proter or malt liquor. Brown study, a state of mental abstraction or serious reverie. Origin: OE. Brun, broun, AS. Brn; akin to D. Bruin, OHG. Brn, Icel. Brnn, Sw. Brun, Dan. Bruun, G. Braun, Lith. Brunas, Skr. Babhru. 93. Cf. Bruin, Beaver, Burnish, Brunette. Source: Websters Dictionary (01 Mar 1998) |
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| brown adipose tissue | A thermogenic type of adipose tissue containing a dark pigment, and arising during embryonic life in certain specific areas in many mammals, including man. It is prominent in the newborn of all species in which it occurs and remains a distinct and conspicuous tissue in the adults of certain species, especially those that hibernate. It is also called brown adipose tissue. (12 Dec 1998) |
| brown atrophy | Atrophy of the heart wall, especially in the elderly, in which the muscle is dark reddish brown and reduced in volume; the muscle fibres become pigmented especially about the nuclei, by lipochrome granules. (05 Mar 2000) |
| brown bill | A bill or halberd of the 16th and 17th centuries. See 4th Bill. "Many time, but for a sallet, my brainpan had been cleft with a brown bill." (Shak) The black, or as it is sometimes called, the brown bill, was a kind of halberd, the cutting part hooked like a woodman's bill, from the back of which projected a spike, and another from the head. Origin: Brown + bill cutting tool. Source: Websters Dictionary (01 Mar 1998) |
| brown fat | A thermogenic type of adipose tissue containing a dark pigment, and arising during embryonic life in certain specific areas in many mammals, including man. It is prominent in the newborn of all species in which it occurs and remains a distinct and conspicuous tissue in the adults of certain species, especially those that hibernate. It is also called brown adipose tissue. (12 Dec 1998) |
| brown fat cell | <pathology> Brown fat is specialised for heat production and the adipocytes have many mitochondria in which an inner membrane protein can act as an uncoupler of oxidative phosphorylation allowing rapid thermogenesis. (18 Nov 1997) |
| brown induration of the lung | A condition characterised by firmness of the lungs, and a brown colour associated with haemosiderin-pigmented macrophages in alveoli, consequent upon long-continued congestion due to heart disease. Synonym: pigment induration of the lung. (05 Mar 2000) |
| brown layer | An exceedingly delicate layer of loose, pigmented connective tissue on the inner surface of the sclera, connecting it with the choroid. Synonym: lamina fusca sclerae, brown layer, membrana fusca. (05 Mar 2000) |
| brown lung | Obstructive airway disease with asthma produced by exposure to cotton dust, flax or hemp. See: byssinosis. (05 Mar 2000) |
| brown oedema | Oedema of the lungs associated with chronic passive congestion. (05 Mar 2000) |
| brown pellicle | A thin film (about 1 um), derived mainly from salivary glycoproteins, which forms over the surface of a cleansed tooth crown when it is exposed to the saliva. Synonym: acquired cuticle, acquired enamel cuticle, brown pellicle, posteruption cuticle. (05 Mar 2000) |
| brown striae | Dark concentric lines crossing the enamel prisms of the teeth, seen in axial cross sections of the enamel. Synonym: brown striae, striae parallelae. (05 Mar 2000) |
| brown thrush | <zoology> A common American singing bird (Harporhynchus rufus), allied to the mocking bird; also called brown thrasher. Source: Websters Dictionary (01 Mar 1998) |
| brown tumour | A mass of fibrous tissue containing haemosiderin-pigmented macrophages and multinucleated giant cells, replacing and expanding part of a bone in primary hyperparathyroidism. (05 Mar 2000) |
| brown's syndrome | <syndrome> An ophthalmology (eye) problem. Brown's syndrome presents as an abnormality at birth (congenitally) and is characterised by an inability to elevate the eyeball when also trying to move the eyeball to the outside. Brown's syndrome can also occur because of other conditions which affect the normal function of the eye muscles. (12 Dec 1998) |
| algae, brown | Predominantly marine algae of the division phaeophyta, having chromatophores containing carotenoid pigments. Genera include ascophyllum, fucus, eisenia, petalonia, ectocarpus. (12 Dec 1998) |
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| Bismarck brown R | A diazo dye similar to Bismarck brown Y. (05 Mar 2000) |
| Bismarck brown Y | A diazo dye used for staining mucin and cartilage in histologic sections, in the Papanicolaou technique for vaginal smears, and as one of Kasten's Schiff-type reagents in the PAS and Feulgen stains. Synonym: vesuvin. Origin: Ger. Bismarckbraun, after Otto von Bismarck, Ger. Chancellor (05 Mar 2000) |
| Blair-Brown graft | A split-thickness graft of intermediate thickness. (05 Mar 2000) |
| Paterson-Brown-Kelly syndrome | <syndrome> Limited elevation of the eye in adduction, appearing clinically as a paresis of the inferior oblique muscle, due to fascia contracting the superior oblique muscle on the same side. Synonym: Brown's syndrome, Paterson-Brown-Kelly syndrome. (05 Mar 2000) |
| Hines-Brown test | A cardiocirculatory challenge conventionally performed by immersing one hand in ice cold water for two or more minutes (as tolerated) to acutely raise the blood pressure, thus imposing resistance to ejection of blood from the left ventricle into the systemic arterial system and consequently acutely increased afterload (afterload = increased left ventricular wall stress). Synonym: Hines-Brown test. (05 Mar 2000) |
| Sudan brown | A brown stain, (C10H7)N==N(C10H6)OH, derived from alpha-naphthylamine and used as a stain for fats. (05 Mar 2000) |
| syndrome, brown's | An ophthalmology (eye) problem. Brown's syndrome presents at birth (congenitally) and is characterised by an inability to elevate the eyeball when also trying to move the eyeball to the outside. (12 Dec 1998) |