| Abbreviation | Definition |
|---|---|
| TNA | Tonsils aNd Adnoids |
| TNA | Total Nail Avulsion |
| TNB | Transthoracic Needle Biopsy |
| TNC | Too Numerous to Count |
| TNC | Total Neutrophil Count |
| TND | Test not done |
| TNE | Trans- Nasal Esophagoscopy |
| TNF | Tumor Necrosing Factor |
| TNI | Targeted Nutritional Intervention |
| TNI | Texas Neurosciences Institute |
| TNI | Total Needed Irradiation |
| TNJ | Talo- Navicular Joint |
| TNM | Tumor, Nodes, Metastases |
| TNS | Tension |
| TNT | Total Neuromuscular Training |
| TNTC | Too Numerous To Count |
| TNV | Tenofovir |
| TNV | Tobacco Necrosis Virus |
| TNX | The Next Xantax |
| TNZ | Thermo- Neutral Zone |