ACA

• abnormal coronary artery;

• acrodermatitis chronica atrophicans;

• acute cerebellar ataxia;

• adenocarcinoma;

• adult child of an alcoholic;

• American Chiropractic Association;

• American College of Allergists;

• American College of Anesthesiologists;

• American College of Angiology;

• American College of Apothecaries;

• American Council on Alcoholism;

• American Counseling Association;

• aminocephalosporanic acid;

• ammonia, copper, and acetate;

• amyotrophic choreoacanthocytosis;

• anisotropic conductive adhesive;

• anterior cerebral artery;

• anterior communicating aneurysm [or artery];

• anticapsular antibody;

• anticardiolipin antibody;

• anticentromere antibody;

• anticollagen antibody;

• anticomplement activity;

• anticytoplasmic antibody;

• arrhythmic cardiac arrest;

• automatic chemical agent alarm;

• Automatic Clinical Analyzer