Darier disease: A genetic skin disease characterized by an abnormality of the horny layer of the skin around the hair follicles. This disorder is inherited in an autosomal dominant manner and is due to mutation in a gene called ATP2A2 on chromosome 12. Also known as keratosis follicularis.
- Dark adaptometry
Dark adaptometry: A type of electrophysiologic retinal testing done to diagnose and manage retinal degeneration by measuring the length of time it takes for the retina to regain maximal sensitivity to low amounts of light after it has been exposed to bright light then returned to darkness.
- Darwin, Charles
Darwin, Charles: English naturalist (1809-82), considered the father of evolution. Darwin voyaged aboard the Beagle to see the wonders of South America. After his return to England, he proposed a mechanism for evolution — natural selection. Darwin noted that successful species produce more offspring in each generation than are needed to replace the adults who […]
- DASH diet
“Use the Dietary Approaches to Stop Hypertension (DASH) eating plan as a guide. DASH encourages you to eat more fresh fruits, vegetables and low fat dairy products, and to limit saturated fat and salt. The DASH eating plan can help you lose weight and maintain a healthier body. In fact, according to the report, sticking […]
Data: Facts, statistics, and the like. In medicine and the health sciences, people often speak of “the data” erroneously in the singular. “Data” is a plural noun and takes a plural verb, as in “the data are very convincing.” It comes from the Latin “datum”, meaning “a thing given.” For the Romans data were surely […]
- Date rape
Date rape: Rape of a woman by a man with whom she is acquainted. The rapist is usually the woman’s “date” (escort). Although there are many possible date rape scenarios, in a common one, the man tries to weaken the resistance of the female by exerting undue psychological pressure upon her or by plying her […]