Category: R
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Rarefying ossification
Chronicosteitis marked by development of granulation tissue in marrow spaces with absorption of surrounding hard bone.
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Reverse osmosis
A form of water treatment that removes infectious particles and dissolved ions more effectively than other water purification techniques. Water so purified can be used in hemodialysis.
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Rotatory nystagmus
Nystagmus in which eyes rotate about the visual axis.
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Rhythmic nystagmus
Nystagmus in which the eyes move slowly in one direction and then are jerked back rapidly.
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Retraction nystagmus
Nystagmus associated with the drawing of the eye backward into the orbit.
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Readiness for enhanced nutrition
A pattern of nutrient intake that is sufficient for meeting metabolic needs and can be strengthened.
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Red nucleus
A large, oval, pigmented mass in the upper portion of the midbrain extending upward into the subthalamus. It receives fibers from the cerebral cortex and cerebellum; the efferent fibers give rise to the rubrospinal tracts.
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Radial notch
A notch on the lateral surface of the coronoid process of the ulna for receiving the circumference of the head of the radius.
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Rheumatic nodule
Subcutaneous nodes of fibrous tissue that may be present in patients with rheumatic fever. A small, palpable bump, often located near the wrist or elbow and detectable through the skin. These nodules are typically present in relatively severe cases of rheumatic fever during childhood. Their presence almost always signifies that the heart has been affected…
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Retracted nipple
A nipple whose tip lies below the level of the surrounding skin. Retraction is caused by deficiency of muscle tissue or the flattening of erectile tissue.