| red 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) |
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| red corpuscle | A red blood cell. (18 Nov 1997) |
| red corpuscles | Red corpuscles are cells that carry oxygen in the blood. They are also called red blood cells or rbcs. (12 Dec 1998) |
| red cross | An international agency providing various humanitarian services. (12 Dec 1998) |
| red degeneration | Necrosis, with staining by haemoglobin, which may occur in uterine myomas, especially during pregnancy; marked by softening and a red colour resembling partly cooked meat. Synonym: carneous degeneration. (05 Mar 2000) |
| red drop effect | Experimental observation that the photosynthetic efficiency of monochromatic light is greatly reduced above 680 nm, even though chlorophyll absorbs well up to 700 nm. Led to the discovery of the two light reactions of photosynthesis. See: photosystems I and II. (18 Nov 1997) |
| red fever | An acute infectious disease with fever, headache, and rash, all quite similar to, but milder than, epidemic typhus, caused by a related microoganism, rickettsia typhi (mooseri), transmitted to humans by rat fleas (xenopsylla cheopis). The animal reservoir includes rats, mice and other rodents. Murine typhus occurs sporadically worldwide but is more prevalent in congested rat-infested urban areas. Also known as endemic typhus, rat-flea typhus; urban typhus of malaya). (12 Dec 1998) |
| red fibres | Red striated muscle fibre's that are rich in sarcoplasm, myoglobin, and mitochondria; they are smaller in diameter and contract more slowly than white fibre's. (05 Mar 2000) |
| red-gum | 1. <medicine> An eruption of red pimples upon the face, neck, and arms, in early infancy; tooth rash; strophulus. 2. A name of rust on grain. See Rust. 3. Eucalyptus gum Origin: OE. Reed gounde; AS. Read red + gund matter, pus. Source: Websters Dictionary (01 Mar 1998) |
| red half-moon | <clinical sign> Irregular red discoloration of the usually pale demilune at the base of the fingernail; may be seen in congestive failure, malignant disease, or liver disease, but not specific for any of these. (05 Mar 2000) |
| red-handed | Having hands red with blood; in the very act, as if with red or bloody hands; said of a person taken in the act of homicide; hence, fresh from the commission of crime; as, he was taken red-hand or red-handed. Source: Websters Dictionary (01 Mar 1998) |
| red hepatisation | The first stage of hepatisation in which the exudate is blood-stained. (05 Mar 2000) |
| red induration | A condition observed in lungs in which there is an advanced degree of acute passive congestion, or acute pneumonitis (sometimes termed interstitial pneumonia), or a similar pathologic process. (05 Mar 2000) |
| red infarct | An infarct red in colour from infiltration of blood from collateral vessels into the necrotic area. Synonym: haemorrhagic gangrene, red infarct. (05 Mar 2000) |
| red lead | A bright orange-red powder that turns black when heated; used in ointments and plasters. Synonym: red lead, red oxide of lead. (05 Mar 2000) |