Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «A»:
Acanthamoeba: A microscopic organism, an amoeba, found in soil, dust and fresh water (lakes, rivers, hot springs and hot tubs). Acanthamoeba also occur in brackish water and sea water as well as in heating, venting, and air conditioner units, humidifiers, and dialysis units.
Acanthamoeba can enter...
Acanthamoeba keratitis: Infection of the cornea by acanthamoeba, a microscopic water-borne ameba. The disease tends to occur in people who wear contact lens. It can accompany a bacterial infection of the eye. Acanthamoeba keratitis can produce corneal ulceration and result in severe loss of vision ...
Acanthosis nigricans: A skin condition characterized by dark thickened velvety patches, especially in the folds of skin in the axilla (armpit), groin and back of the neck. The condition is complex. It can occur with endocrine diseases such as Cushing disease, tumors of the pituitary, and diabetes me...
Acapnia: Less than the normal level of
carbon dioxide in the blood. The opposite of hypercapnia. The origin
of the word "acapnia" is curious. It comes from the Greek "a-"
meaning "without" + "kapnos" meaning "smoke" so acapnia literally
means "smokeless" referring to carbon dioxide which is a pr...
Acaricide: An agent, usually a chemical, that kills mites. This class of pesticides is large and includes antibiotic acaricides,
carbamate acaricides, formamidine acaricides, mite growth regulators,
organophosphate acaricides, and many others. From the Latin acarus, a mite + -cide, to kill....
Acathisia: See: Akathisia....
ACC: Adenoid cystic carcinoma....
Accelerated phase of leukemia
Accelerated phase of leukemia:
Refers to chronic myelogenous leukemia (CML) that is progressing. The number of immature, abnormal white blood cells in the bone marrow and blood is higher than in the chronic phase but not as high as in the blast phase....
Acceptable daily intake
Acceptable daily intake: Estimate of the amount of a substance in food or drinking water, expressed on a body mass basis (usually mg/kg body weight), which can be ingested daily over a lifetime by humans without appreciable health risk. For calculation of the daily intake per person, a standard body...
Access: 1. In general, a means of approaching something.
2. In health care, the opportunity or right to receive health care.
3. In dialysis, the point on the body where a needle or catheter is inserted to gain entry to the bloodstream....
Accessibility of services
Accessibility of services: The ability to get medical care and services when needed....
Accessory: Additional, extra, supplementary, subsidiary to the main thing.
An accessory digestive organ is an organ that helps with digestion but is not part of the digestive tract.
The accessory nerve is so-called because it receives an additional (accessory) root from the upper part of the spina...
Accessory digestive organ
Accessory digestive organ: An organ that helps with digestion but is not part of the digestive tract. The accessory digestive organs are the tongue, salivary glands, pancreas, liver, and gallbladder....
Accessory dwelling unit
Accessory dwelling unit: (ADU) A separate housing arrangement within a single-family home. The ADU is defined by Medicare as a complete living unit and includes a private kitchen and bath....
Accessory nerve: The eleventh cranial nerve, which emerges from the skull and receives an additional (accessory) root from the upper part of the spinal cord. It supplies the sternocleidomastoid and trapezius muscles. The sternocleidomastoid muscle is in the front of the neck and turns the head. The...