| linear epidermal nevus | A congenital systematised linear nevus limited to one side of the body or to portions of the extremities on one side; lesions are often extensive, forming wave-like bands on the trunk and spiraling streaks on the extremities. Synonym: linear epidermal nevus. (05 Mar 2000) |
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| alcian blue | <chemical> Water soluble copper phthalocyanin stain used to demonstrate acid mucopolysaccharides. By varying the ionic strength some differentiation of various types is possible. (18 Nov 1997) |
| alkaline toluidine blue O | Toluidine blue O in borax solution, used with heat on semithick sections of epoxy embedded tissues. (05 Mar 2000) |
| aniline blue | A mixture of sulfonated triphenylmethane dyes used widely as a connective tissue stain and counterstain. (05 Mar 2000) |
| azovan blue | <chemical> 6,6'-((3,3'-dimethyl(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis (4-amino-5-hydroxy-1,3-naphthalenedisulfonic acid) tetrasodium salt. An azo dye used in blood volume and cardiac output measurement by the dye dilution method. It is very soluble, strongly bound to plasma albumin, and disappears very slowly. Pharmacological action: dyes. Chemical name: 1,3-Naphthalenedisulfonic acid, 6,6'-((3,3'-dimethyl(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis(4-amino-5-hydroxy-, tetrasodium salt (12 Dec 1998) |
| basic fuchsin-methylene blue stain | <technique> A stain for intact epoxy sections; semi-thick sections of plastic-embedded tissues have nuclei stained purple; collagen, elastic lamina, and connective tissue are stained blue; mitochondria, myelin, and lipid droplets are stained red; cytoplasm, smooth muscle cells, axoplasm, and chrondroblasts are stained pink. (05 Mar 2000) |
| Berlin blue | Fe4(Fe(CN)6)3; ferric ferrocyanide;a dye used to colour injection masses for blood vessels and lymphatics, and in staining of siderocytes. Synonym: Prussian blue. (05 Mar 2000) |
| blue | 1. Having the colour of the clear sky, or a hue resembling it, whether lighter or darker; as, the deep, blue sea; as blue as a sapphire; blue violets. "The blue firmament." 2. Pale, without redness or glare, said of a flame; hence, of the colour of burning brimstone, betokening the presence of ghosts or devils; as, the candle burns blue; the air was blue with oaths. 3. Low in spirits; melancholy; as, to feel blue. 4. Suited to produce low spirits; gloomy in prospect; as, thongs looked blue. 5. Severe or over strict in morals; gloom; as, blue and sour religionists; suiting one who is over strict in morals; inculcating an impracticable, severe, or gloomy mortality; as, blue laws. 6. Literary; applied to women; an abbreviation of bluestocking. "The ladies were very blue and well informed." (Thackeray) Blue asbestus. See Crocidolite. Blue black, of, or having, a very dark blue colour, almost black. Blue blood. See Blood. Blue buck, sulphate of copper, a violet blue crystallized salt, used in electric batteries, calico printing, etc. Blue water, the open ocean. To look blue, to look disheartened or dejected. True blue, genuine and thorough; not modified, nor mixed; not spurious; specifically, of uncompromising Presbyterianism, blue being the colour adopted by the Covenanters. "For his religion . . . 'T was Presbyterian, true blue." (Hudibras) Origin: OE. Bla, blo, blew, blue, Sw. Bl, D. Blauw, OHG. Blo, G. Blau; but influenced in form by F. Bleu, from OHG. Blao. 1. One of the seven colours into which the rays of light divide themselves, when refracted through a glass prism; the colour of the clear sky, or a colour resembling that, whether lighter or darker; a pigment having such colour. Sometimes, poetically, the sky. 2. A pedantic woman; a bluestocking. 3. [Short for blue devils] Low spirits; a fit of despondency; melancholy. Berlin blue, Prussian blue. Mineral blue. See Mineral. Prussian blue. See Prussian. Source: Websters Dictionary (01 Mar 1998) |
| blue asphyxia | A form of asphyxia neonatorum in which the skin is cyanotic, but the heart is strong and the reflexes are preserved. Synonym: blue asphyxia. (05 Mar 2000) |
| blue atrophy | Depressed blue atrophic scars due to injections in the skin of impure substances, as seen in narcotics addicts. (05 Mar 2000) |
| blue baby | A baby born with various defects in the structure of the heart and major blood vessels such as tetralogy of Fallot and transposition of the great vessels. The net result is the inability to oxygenate the blood resulting in cyanosis (bluish discolouration to the skin). Immediate surgical procedures are currently available to correct these genetic abnormalities. (27 Sep 1997) |
| blue-bonnet | 1. A broad, flat Scottish cap of blue woolen, or one waring such cap; a Scotchman. 2. <botany> A plant. Same as Bluebottle. 3. <zoology> The European blue titmouse (Parus coeruleus); the bluecap. Source: Websters Dictionary (01 Mar 1998) |
| blue cataract | Coronary cataract of bluish colour. Synonym: cataracta cerulea. (05 Mar 2000) |
| blue cone monochromatism | Impaired, but not absent, colour vision with less severely reduced visual acuity than in complete achromatopsia; inherited as an autosomal recessive or as an X-linked disorder (blue cone monochromism; pi cone monochromatism ). (05 Mar 2000) |
| blue cross | A prepaid health insurance plan for hospital costs and related services. It usually excludes physicians' services (which are covered under blue shield). (12 Dec 1998) |