| ANOC, AnOC | anodal opening contraction |
|---|---|
| AOC | abridged ocular chart; amyloxycarbonyl; anodal opening contraction; area of concern |
| AOO | anodal opening odor; atrial asynchronous (competitive, fixed-rate) [pacemaker] |
| AOP | anodal opening picture; aortic pressure |
| AOS | American Ophthalmological Society; American Otological Society; anodal opening sound; anterior [o]es... |