| OTF | octamer-binding transcription factor; oral transfer factor |
|---|---|
| OTFC | oral transmucosal fenatyl citrate |
| OTI | ovomucoid trypsin inhibitor |
| OTM | orthotoluidine manganese sulfate |
| OTO | otology; otorhinolaryngology |
| Oto. | Otology |
| Otol | otology, otologist |
| OTPS | other than personal services |
| OTR | Ovarian Tumor Registry; Occupational Therapist, Registered |
| OTReg | Occupational Therapist, Registered |