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(ā″jī′rē-ă) [a- + gyro- + -ia] Incompletely developed convolutions of the cerebral cortex. agyric (-rik), adj.


A blood test to identify deficiencies in the alternative complement pathway. Low levels are associated with increased susceptibility to immune and infectious diseases.


alpha-hydroxy acid; American Heart Association; American Hospital Association.


antihemophilic factor, coagulation factor VIII. SEE: coagulation factor.


Alkhurma hemorrhagic fever.


antihemophilic globulin, coagulation factor VIII. SEE: coagulation factor.


American Health Information Management Association.


Agency for Healthcare Research and Quality.


Aortic insufficiency; artificial insemination; artificial intelligence.


American Indian or Alaskan Native (used by U.S. government agencies).

Aicardi-Goutières syndrome

(e-kar-dē′-goo-tyer′) [Jean François Marie Aicardi, Fr. pediatrician, b. 1926; Françoise Goutières] A rare inherited mental retardation in which affected infants also have both encephalopathy and liver disease. It may mimic TORCH or toxoplasmosis. SYN: pseudo-TORCH syndrome.

Aicardi syndrome

(ī-kar′dē) [Jean François Marie Aicardi, Fr. neurologist, b. 1926] A rare cause of childhood seizures, due to the congenital absence of the corpus callosum. The disease is only found in children with two X chromosomes or in those with Klinefelter's syndrome.


(āk″mō-fō′bē-ă) [Gr. aichmē, spear point + -phobia] A phobia of being touched by pointed objects or fingers.


Agency for International Development; artificial insemination donor.


(ād) [Fr. aide, help] 1. Assistance provided to a person, esp. one who is sick, injured, or troubled. 2. A resource used by a person to improve functioning; an assistive device.

ambulation a. Any device that helps people walk upright, including canes, crutches, and walkers.

bone conduction hearing a., bone-conduction hearing aid A hearing aid that amplifies sounds and transmits them through the skull or through an implant anchored in the skull.

decision a. A clinical algorithm or educational tool to assist patients or health care professionals in making choices about aspects of care. SYN: decision instrument; decision rule.

ergogenic a. In sports medicine, the questionable and often harmful use of various substances to try to enhance performance. Some of these materials, e.g., blood transfusions, anabolic steroids, amphetamines, amino acids, and human growth hormone, are standard medicines approved for uses other than ...

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