| leukoedema, oral | A disorder of the buccal mucosa resembling early leukoplakia, characterised by the presence of filmy opalescence of the mucosa in the early stages to a whitish gray cast with a coarsely wrinkled surface in the later stages, associated with intracellular oedema of the spinous or malpighian layer. (12 Dec 1998) |
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| leukoplakia, oral | A white patch seen on the oral mucosa. It is considered a premalignant condition and is often tobacco-induced. When evidence of epstein-barr virus is present, the condition is called hairy leukoplakia (leukoplakia, hairy). (12 Dec 1998) |
| lichen planus, oral | Oral lesions accompanying cutaneous lichen planus or often occurring alone. The buccal mucosa, lips, gingivae, floor of the mouth, and palate are usually affected (in a descending order of frequency). Typically, oral lesions consist of radiating white or gray, velvety, threadlike lines, arranged in a reticular pattern, at the intersection of which there may be minute, white, elevated dots or streaks (wickham's striae). (12 Dec 1998) |
| live oral poliovirus vaccine | Inactivated poliovirus vaccine (IPV), an aqueous suspension of inactivated strains of poliomyelitis virus (types 1, 2, and 3) used by injection; has largely been replaced by the oral vaccine. See: Salk vaccine. (05 Mar 2000) |
| acid red 87 | Eosin Ys, the disodium salt of 2',4',5',7'-tetrabromofluorescein. Synonym: acid red 87, eosin yellowish. (05 Mar 2000) |
| acid red 91 | The disodium salt of 4',5'-dibromo-2',7'-dinitrofluorescein. Synonym: acid red 91, eosin I bluish. (05 Mar 2000) |
| 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) |