Category: R
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Reading
A note taken of figures, especially of degrees on a scale. The process of perceiving and recognizing written symbols and translating them into words that individually and together convey meaning. Though many of us take reading for granted, it is, in fact, a highly complex process, and many people have difficulty with one or another…
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Reactive hyperaemia
Congestion of blood vessels after an occlusion has been removed.
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Reactive arthritis
Arthritis caused by a reaction to something. An aseptic (that is, not involving infection) arthritis provoked by an immune reaction to an episode of infection elsewhere in the body. It often occurs in association with enteritis caused by Salmonella and certain shigella strains, and in both yersinia and campylobacter enteritis. Nongonococcal urethritis, usually due to…
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Reactivate
To make something active again. To make active again (e.g., to restore to a physiological response or to awaken a dormant infection.
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Reactionary haemorrhage
Bleeding which follows an operation.
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Reaction
An action which takes place as a direct result of something which has happened earlier. An effect produced by a stimulus. The particular response of someone to a test. Response to a stimulus, especially in medicine. The response of an organism, or part of it, to a stimulus. In chemistry, it refers to the combination…
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React
To react to something to act because of something else, to act in response to something. To react with something (of a chemical substance) to change because of the presence of another substance.
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Reach
The distance which one can stretch to get hold of or touch something. The distance which one can travel easily.
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Reabsorption
The process of being reabsorbed. The process of absorbing again. It occurs in the kidney when some of the materials filtered out of the blood by the glomerulus are reabsorbed as the filtrate passes through the nephron.
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Reabsorb
To absorb or take up something again.