| KO | keep on; keep open; killed organism; knee orthosis; knock out |
|---|---|
| LLO | Legionella-like organism |
| MLO | mesiolinguo-occlusal; Mycoplasma-like organism |
| OID | optimal immunomodulating dose; Organism Identification Number; oxygen insufflation device |
| PO | by mouth, orally [Lat. per os]; parieto-occipital; parietal operculum; period of onset; perioperativ... |