| MR | Maddox rods; magnetic resistance; magnetic resonance; mandibular reflex; mannose-resistant; may repe... |
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| MRBC | monkey red blood cell; mouse red blood cell |
| NRBC | National Rare Blood Club; normal red blood cell; nucleated red blood cell |
| RCC | radiological control center; rape crisis center; ratio of cost to charges; receptor-chemoeffector co... |
| RCF | red cell ferritin; red cell folate; relative centrifugal field/force; ristocetin cofactor |
| 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) |
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| 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) |
| red mange | Demodectic mange in dogs. (05 Mar 2000) |
| red muscle | Slow-twitch muscle in which small dark "red" muscle fibres predominate; myoglobin is abundant and great numbers of mitochondria occur, characterised by slow, sustained (tonic) contraction. Contrast with white muscle. (05 Mar 2000) |
| red neuralgia | Disease marked by paroxysmal, bilateral vasodilatation, particularly of the extremities, with burning pain, and increased skin temperature and redness. (12 Dec 1998) |
| red nucleus | A distinctive oval nucleus (pink in fresh specimens because of an iron-containing pigment in many of the cells) centrally placed in the upper mesencephalic reticular formation. It receives fibres from the deep cerebellar nuclei and cerebral cortex and projects fibres to the cerebellum, brainstem, spinal cord, and probably to the thalamus. The nucleus is divided into two regions: pars magnocellularis and pars parvocellularis. (12 Dec 1998) |
| red oxide of 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) |
| red precipitate | mercuric oxide, red |
| red pulp | Splenic pulp seen grossly as a reddish brown substance, due to its abundance of red blood cells, consisting of splenic sinuses and the tissue intervening between them (splenic cords). (05 Mar 2000) |
| red pulp cords | The tissue occurring between the venous sinuses in the spleen. Synonym: Billroth's cords, red pulp cords. (05 Mar 2000) |
| red-riband | <zoology> The European red band fish, or fireflame. See Rend fish. Source: Websters Dictionary (01 Mar 1998) |