A Accommodation 适应,调节

A-Bomb cigarette of marijuana and heroin mixture 大麻和海洛英混制香烟

A-D analog-digital 模-数转换

A-EB acquired (non-inherited) epidermolysis bullosa acquisita 获得性（非遗传性）大泡性表皮松解

A-S Adams-Stokes 亚当斯-斯托克斯（综合征）

a.c. alternating current 交流电

a.p. ante prandium (拉)午饭前

A.T.10 dihydrotachysterol 双氢速变固醇

A/B acid base 酸/碱比率

a/c anchored catheter 固定导管

A/G ratio. albumin-globulin ratio 白-球蛋白比

a/p assessment and plan 评价与计划

a/v artery-to-vein ratio 动-静脉比例

a/w (in)accordance with 依照,依据

A&T adenoidectomy & tonsillectomy 增殖腺切除术和扁桃体切除术

A&W Alive and Well 健在,非常健康

AA Abdominal Aorta 腹主动脉

AA-E Acrylic acid-ethylene 丙烯酸-乙烯

AAA Ancylostomiasis 钩虫病

AACG Acute Angle Closure Glaucoma 急性闭角型青光眼（眼科）