| acid red 91 | The disodium salt of 4',5'-dibromo-2',7'-dinitrofluorescein. Synonym: acid red 91, eosin I bluish. (05 Mar 2000) |
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| algae, red | Algae of the division rhodophyta, in which the pigment is predominantly red; common genera are gelidium, gracilaria, and polysiphonia. (12 Dec 1998) |
| alizarin red S | Sodium alizarin sulfonate;used as a stain for calcium in bone (calcium appears red-orange, magnesium, aluminum, and barium are varying shades of red), in the determination of fluorine; as a pH indicator it changes from yellow to purple between pH 3.7 and 5.2. (05 Mar 2000) |
| American Red Cross | The national Red Cross society of the United States, established by Congress to assist in caring for the sick and wounded, serving as a communications link between members of the U.S. Armed forces and their families, conducting disaster relief and prevention programs, and furnishing other humanitarian services, the largest of which is a network of regional blood centres providing blood and blood products. (05 Mar 2000) |
| amidonaphthol red | An azo dye, C18H13N3S2Na2, used in light and fluorescence microscopy as a real acid counterstain. Synonym: azophloxin. (05 Mar 2000) |
| Bennhold's Congo red stain | <technique> An amyloid stain useful for amyloid detection in pathologic tissue; gives red staining of amyloid; also induces green birefringence to amyloid under polarised light. (05 Mar 2000) |
| Biebrich scarlet red | Synonym: scarlet red. Origin: Biebrich, Germany (05 Mar 2000) |
| Bizzozero's red cells | Nucleated red blood cells in human blood. (05 Mar 2000) |
| brilliant vital red | Trisodium salt of a sulfonated diazo dye (a ditolyl group diazotised to sulfonated aminonaphthalene residues), used as a vital stain. Synonym: brilliant vital red. (05 Mar 2000) |
| packed red blood cell | <haematology> Red blood cells collected from one individual that are packed into a small volume for transfusion into a patient. (16 Dec 1997) |
| red | Of the colour of blood, or of a tint resembling that colour; of the hue of that part of the rainbow, or of the solar spectrum, which is furthest from the violet part. "Fresh flowers, white and reede." "Your colour, I warrant you, is as red as any rose." (Shak) Red is a general term, including many different shades or hues, as scarlet, crimson, vermilion, orange red, and the like. Red is often used in the formation of self-explaining compounds; as, red-breasted, red-cheeked, red-faced, red-haired, red-headed, red-skinned, red-tailed, red-topped, red-whiskered, red-coasted. Red admiral, kermesite. See Kermes mineral, under Kermes. <botany> Red ash, any species of noctuid moths belonging to Catacola and allied genera. The numerous species are mostly large and handsomely coloured. The under wings are commonly banded with bright red or orange. Red water, a disease in cattle, so called from an appearance like blood in the urine. Origin: OE. Red, reed, AS. Red, red; akin to OS. Rd, OFries, rd, D. Rood, G. Roht, rot, OHG. Rt, Dan. & Sw. Rd, Icel. Raur, rjr, Goth. Ruds, W. Rhudd, Armor. Ruz, Ir. & Gael. Ruadh, L. Ruber, rufus, Gr, Skr. Rudhira, rohita; cf. L. Rutilus. Cr. Erysipelas, Rouge, Rubric, Ruby, Ruddy, Russet, Rust. 1. The colour of blood, or of that part of the spectrum farthest from violet, or a tint resembling these. "Celestial rosy red, love's proper hue." 2. A red pigment. 3. An abbreviation for Red Republican. See Red. 4. <medicine> The menses. English red, a pigment prepared by the Dutch, similar to Indian red. Hypericum red, a red resinous dyestuff extracted from Hypericum. Indian red. See Indian, and Almagra. Source: Websters Dictionary (01 Mar 1998) |
| red atrophy | Atrophy due to destruction of the parenchymatous cells of an organ as a consequence of chronic venous congestion. Synonym: red atrophy. (05 Mar 2000) |
| red blood cell | <haematology> Cell specialised for oxygen transport, having a high concentration of haemoglobin in the cytoplasm (and little else). Biconcave, anucleate discs, 7nm diameter in mammals, nucleus contracted and chromatin condensed in other vertebrates. Acronym: RBC (18 Nov 1997) |
| red blood cell cast | A urinary cast composed of a matrix containing red cells in various stages of degeneration and visibility, characteristic of glomerular disease or renal parenchymal bleeding. Synonym: red cell cast. (05 Mar 2000) |
| red blood cell count | A normal value is 4.6-6.2 million RBC's per cubic millimetre of blood. This number can increase in cases of dehydration (fluid loss) or severe lung disease. Interestingly, red blood cell counts are much higher in those who live at high altitude, because of the increased demand for oxygen carrying capacity. (27 Sep 1997) |