Atherosclerotic aneurysm
Atherosclerotic aneurysm: The most common type of aneurysm, affecting the abdominal portion of the aorta and other large arteries, particularly with age.
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- Athetosis
Athetosis: Involuntary writhing movements, particularly of the arms and hands. Athetosis is associated with several neurological disorders, such as cerebral palsy and Rett syndrome.
- Athlete's foot
A skin infection caused by a fungus called Trichophyton that thrives within the upper layer of the skin when it is moist, warm, and irritated. The fungus can be found on floors and in socks and clothing, and it can be spread from person to person through contact with these objects. However, without proper growing […]
- Athymic mouse
Athymic mouse: A laboratory mouse lacking a thymus gland. Athymic mice have no T cells and useful in research because they do not reject tumor or other cells transplanted from mice, humans or other species. See: Nude mouse.
- Atkins diet
A high-protein, high-fat, low-carbohydrate weight-loss diet popularized by Dr. Robert C. Atkins that allows for unrestricted amounts of meat, cheese and eggs while severely restricting carbohydrates, including sugar, bread, pasta, milk, fruits and vegetables. The Atkins diet is based on the theory that eating carbohydrates stimulates the production of insulin, which in turn leads to […]
- Atlantoaxial
Atlantoaxial: Pertaining to the first and second cervical vertebrae which meet at a joint called the atlantoaxial joint. The uppermost cervical vertebra (the atlas) rotates about the odontoid process of the second cervical vertebra (the axis). The joint between the axis and atlas is a pivot type of joint that allows the head turn.