| HGMCR | human genetic mutant cell repository |
|---|---|
| IGA | infantile genetic agranulocytosis |
| 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 |