Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «D»:
DVT (deep vein thrombosis)
DVT (deep vein thrombosis): Blood clotting in the
veins of the inner thigh or leg. In air travel, DVT is the
"economy-class syndrome." Even in young, health travelers
the long stretches immobilized in cramped seats in cabins with very
low humidity set the stage for the formation of a t...
Dwarf: Someone with dwarfism, which is now more correctly called short stature. People with dwarfism (short stature) also consider themselves little people, as in the Little People of America....
Dwarfism: Abnormally short stature. Some forms are hereditary. The Little People of America (LPA) define dwarfism as an adult height of 148 cm (4 feet 10 inches) or less. Also known as nanism. Dwarfism is now more correctly called short stature.
See also specific types, such as Achondroplasia, Hypo...
Dwarfism, achondroplastic: A genetic disorder of bone growth, achondroplasia is the most common cause of short stature with disproportionately short limbs -- dwarfism with short arms and legs. There is a typically large head with prominence of the forehead (frontal bossing), underdevelopment (hypopl...
Dwarfism, pituitary: Dwarfism caused by a lack of growth hormone, usually due to malfunction of the pituitary gland. Children with growth hormone deficiency may grow normally for the first two to three years of life but they then fall behind their peers in height. They are normally proportioned. Thi...
Dwarfism, thanatophoric: A form of short-limbed (micromelic) dwarfism that usually causes death within the first few hours after birth. Thanatophoric dysplasia is due to a lethal mutation (change) in the same gene that produces achondroplasia, a familiar and far more common form of short-limbed dwar...
Dx: Abbreviation standing for diagnosis, the determination of the nature of a disease. Dx may alternatively be written DX or dx.
See also Diff dx....
DXA: Dual X-ray absorptometry. A technique for scanning bone and measuring bone mineral density (BMD). A DXA scanner is a large machine that produces 2 X-ray beams, each with different energy levels. One beam is high energy while the other is low energy. The amount of x-rays that pass through the bo...
DXA bone scan
DXA bone scan: See: DXA....
DXM: Dextromethorphan, a cough suppressant, sometimes misused as a recreational drug....
Dyad: The word "dyad" comes from the Greek "dyas" meaning the number two.
In psychology, a dyad refers to a pair of persons in an interactional situation. For example, a patient and therapist, a woman and her husband, a girl and her stepfather, etc.
In chemistry, a dyad is a bivalent element. And i...
Dynacin: Brand name for minocycline....
Dynein: A family of microtubule motor proteins that derive energy from ATP (adenosine triphosphatase) activity. The dyneins also form arms on the outer tubules of cilia and flagella.
The dynein motor, a cellular complex believed to be composed of 12 distinct protein parts, performs fundamental tr...
DYS: Symbol for familial dysautonomia. See: Familial dysautonomia. ...
Dysarthria: Speech that is characteristically
slurred, slow, and difficult to produce (difficult to understand). The person with dysarthria may also have problems controlling the
pitch, loudness, rhythm, and voice qualities of their
Dysarthria is a disorder caused by paralysis, weakness,...