| COV | covariance; cross-over value |
|---|---|
| DOSS | distal over-shoulder strap; dioctyl sodium sulfosuccinate; docusate sodium |
| ONC | oncogene; oncology; Orthopaedic Nursing Certificate; over-the-needle catheter |
| OSS | over-the-shoulder strap |
| OTC | ornithine transcarbamylase; oval target cell; over-the-counter; oxytetracycline |