Alpha, the first letter of the Greek alphabet.
accommodation; ampere; anode; anterior; area; artery.
Achievement age; Alcoholics Anonymous; amino acid; arteriae; arteries.
abdominal aortic aneurysm; acne-associated arthritis; American Academy of Allergists; American Ambulance Association; American Association of Anatomists; Area Agency on Aging.
American Association of Blood Banks.
American Association for Clinical Chemistry.
American Association of Critical-Care Nurses; American Association of Colleges of Nursing.
American Association of Cardiovascular and Pulmonary Rehabilitation.
American Academy of Family Physicians.
American Association for the History of Nursing.
American Association of Medical Assistants.
Association for the Advancement of Medical Instrumentation; age-associated memory impairment.
Association of Air Medical Services.
American Association for Medical Transcription.
American Academy of Nursing.
American Association of Nurse Anesthetists.
American Association of Neuroscience Nurses.
American Academy of Nurse Practitioners.
American Association of Occupational Health Nurses.
American Association of Oral and Maxillofacial Surgeons.
American Academy of Orthopedic Surgeons.
American Academy of Pediatrics; American Association of Pathologists.
American Academy of Physician Assistants.
American Academy of Physical Medicine and Rehabilitation.
The ratio of arterial oxygen partial pressure (a) to alveolar oxygen partial pressure (A). Under normal conditions, 90% or more of the partial pressure of oxygen in the lungs will diffuse into the blood yielding an a/A ratio greater than 0.9. This value can be used to determine whether there is a problem with gas diffusion.