Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «A»:
Acrocyanosis: Blueness of the extremities (the hands
and feet). Acrocyanosis is typically symmetrical. It is marked by a
mottled blue or red discoloration of the skin of the fingers and
wrists and the toes and ankles and by profuse sweating and coldness
of the fingers and toes.
Acrocyanosis is ...
Acrodermatitis enteropathica: An historic model for
therapy of genetic disease. In an era (the 1950s) when inherited
disorders were usually
seen as hopeless, this progressive hereditary (autosomal recessive)
disease of children
was found treatable. Acrodermatitis enteropathica is characterize...
Acrodynia: Pain in the extremities (the hands and feet)....
Acromegaly: Condition due to the production of too much growth hormone by the pituitary gland after the end of adolescence.
When there is secretion of too much growth hormone before the end of adolescence, gigantism results. People with pituitary gigantism can truly be giants; they can sometimes e...
Acromioclavicular joint: The acromioclavicular (AC) joint is located between the acromion (a projection of the scapula that forms the point of the shoulder) and the clavicle (the collar bone). This is a gliding type of joint.
The ligaments that serve to support and strengthen this joint are called t...
Acromion: The projection of the scapula (the shoulder blade) that forms the point of the shoulder.
The acromion is part of the scapula. It protrudes laterally (away from the midline) and is triangular in shape.
The top of the shoulder is acromial. The word "acromion" comes from the Greek "akron",...
Acrophobia: An abnormally excessive and persistent fear of
heights. Sufferers experience severe anxiety even though they usually
realize that, as a rule, heights pose no real threat to them.
Derived from the Greek "acron", height + "phobos", fear....
Acrylamide: A chemical created in foods when starches and other carbohydrates are overheated (over 120°C or 250°F) during cooking. There is concern that acrylamide may be a carcinogen (cause cancer).
Acrylamide is used in papermaking, ore processing, permanent-press fabrics, and dye manufact...
ACS (American Cancer Society)
ACS (American Cancer Society): A "nationwide community-based voluntary health organization dedicated to eliminating cancer as a major health problem by preventing cancer, saving lives and diminishing suffering from cancer through research, education, advocacy, and service."
The American Cancer Soc...
ACS (American College of Surgeons)
ACS (American College of Surgeons): The American College of Surgeons was formed in 1913 under the aegis of Dr. John Miller Turpin Finney "to elevate the standard of surgery, to establish a standard of competency and of character for practitioners of surgery, and to educate the public and the profess...
Actinic: Referring to the ultraviolet (UV) rays from sunlight and UV lamps. Sunburn is an actinic burn. An actinic keratosis is a skin lesion that is the consequence of chronic sun exposure. From the Greek "aktis" meaning "ray."...
Actinic keratosis: A small rough spot on skin chronically exposed to the sun, precancerous, can develop into a skin cancer called squamous cell carcinoma, a process that typically takes years. Actinic keratoses occur most frequently in fair-skinned people. Common locations are the face, scalp, back ...
Actinomycetes: A group of gram-positive bacteria (order Actinomycetales) that produce various bioactive agents including antibiotics, enzymes, and vitamins. Streptomyces belong to this bacterial order....
Activase: Brand name of alteplase, a tissue plasminogen activator made by recombinant DNA technology. See: Tissue plasminogen activator....
Activated charcoal: Charcoal that has been heated to increase its absorptive capacity. Activated charcoal is sold as an over-the-counter (OTC) product to help relieve intestinal gas. It is also used to absorb poisons (as in gas mask filters), neutralize poisons that have been swallowed, and filter ...