| OS | 1) Opening Snap 2) Orthopedic(Osteo)-Surgery; Á¤Çü ¿Ü°ú 3) Ocu... |
|---|---|
| A2-OS | aortic second sound, opening snap |
| ANOC, AnOC | anodal opening contraction |
| ANOCL | anodal opening clonus |
| AOC | abridged ocular chart; amyloxycarbonyl; anodal opening contraction; area of concern |