Retinopathy, arteriosclerotic
Arteriosclerotic retinopathy.
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- Retinoschisis
Splitting of the retina. From retina + -schisis (splitting).
- Retrodiagnosis
Retrospective diagnosis. The proposal that the mysterious illness that killed Alexander the Great more than 2,300 years ago was West Nile fever is an exercise in retrodiagnosis.
- Retrograde amnesia
Amnesia in which the lack of memory relates to events that occurred before a traumatic event. Retrograde amnesia is in contrast to antegrade amnesia in which the lack of memory relates to events that occurred after a traumatic event.
- Relaxin
A hormone that is produced during pregnancy that facilitates the birth process by causing a softening and lengthening of the cervix and the pubic symphysis (the place where the pubic bones come together). Relaxin also inhibits contractions of the uterus and may play a role in determining the timing of delivery.
- Relaxant
Something that relaxes, relieves, or reduces tension. For example, a muscle relaxant is often administered during abdominal surgery to relax the diaphragm and keep it from moving during the surgery.