| CRD | carbohydrate-recognition domain; chronic renal disease; chronic respiratory disease; child restraint... |
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| CRI | Cardiac Risk Index; catheter-related infection; chronic renal insufficiency; chronic respiratory ins... |
| CSF-WR | cerebrospinal fluid-Wassermann reaction |
| DER | disulfiram-ethanol reaction; dual energy radiography |
| DeR | degeneration reaction |
| Weinberg's reaction | A complement fixation test of the presence of hydatid disease. (05 Mar 2000) |
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| Wernicke's reaction | In hemianopeia, a reaction due to damage of the optic tract, consisting in loss of pupillary constriction when the light is directed to the blind side of the retina; pupillary constriction is maintained when light stimulates the normal side. This sign cannot be seen with a bright light because of intraocular scatter onto the seeing half of the retina. Synonym: Wernicke's sign. (05 Mar 2000) |
| combustion reaction | <chemistry> The vigorous and exothermic reaction that takes place between certain substances, particularly organic compounds, and oxygen. (09 Jan 1998) |
| wheal-and-erythema reaction | The characteristic immediate reaction observed in the skin test; within 10 to 15 minutes after injection of antigen (allergen), an irregular, blanched, elevated wheal appears, surrounded by an area of erythema (flare). Synonym: wheal-and-flare reaction. (05 Mar 2000) |
| wheal-and-flare reaction | The characteristic immediate reaction observed in the skin test; within 10 to 15 minutes after injection of antigen (allergen), an irregular, blanched, elevated wheal appears, surrounded by an area of erythema (flare). Synonym: wheal-and-flare reaction. (05 Mar 2000) |
| whitegraft reaction | An immune reaction to a tissue graft that results in failure of graft vascularization and ensuing rejection. (05 Mar 2000) |
| white reaction | The response seen in many individuals after the skin is lightly stroked with a blunt instrument; it is attributed to capillary action. (05 Mar 2000) |
| Widal's reaction | Agglutination reaction as applied to the diagnosis of typhoid. Synonym: Gruber's reaction, Gruber-Widal reaction. (05 Mar 2000) |
| complement-fixation reaction | <immunology> Binding of complement as a result of its interaction with immune complexes (the classical pathway) or particular surfaces (alternative pathway). (18 Nov 1997) |
| plasmal reaction | <chemistry> Long chain aliphatic aldehydes occurring in plasmalogens react with Schiff's reagent in the so called plasmal reaction, to form for example palmitaldehyde, stearaldehyde. (31 Dec 1997) |
| plasmocytic leukemoid reaction | The presence of unusual numbers of plasma cells, i.e., plasmocytosis, in the bone marrow; may be observed in association with sarcoidosis, rheumatoid arthritis, cirrhosis, Hodgkin's disease, and certain of the so-called collagen diseases. (05 Mar 2000) |
| pleural reaction | Thickening of the pleural stripe on chest radiographs, representing pleuritis, pleural effusion, or pleural fibrosis. (05 Mar 2000) |
| consensual reaction | Contraction of the pupil of the fellow eye in consensus with the pupil of the illuminated eye. Synonym: consensual light reflex, indirect pupillary reaction. (05 Mar 2000) |
| constitutional reaction | A generalised reaction in contrast to a focal or local reaction; in allergy the immediate or delayed response, following the introduction of an allergen, occurring at sites remote from that of injection. (05 Mar 2000) |
| conversion reaction | A conversion of emotional stress or mental disturbance into a physical symptom. Examples include paralysis, blindness, inability to speak or another sudden debilitating problem for no reason evident through testing. (27 Sep 1997) |