| AOP | anodal opening picture; aortic pressure |
|---|---|
| AOS | American Ophthalmological Society; American Otological Society; anodal opening sound; anterior [o]es... |
| AOT | accessory optic tract; Anderson Olsson table; anodal opening tetanus; Association of Occupational Th... |
| AOTe | anodal opening tetanus |
| CaOC | cathodal opening contraction |