| Acronym | Definition |
|---|
| TNC | The Nature Conservancy |
| TNC | Terms and Conditions |
| TNC | Togainu No Chi (anime) |
| TNC | Transportation Network Companies (ridesharing) |
| TNC | Terminal Node Controller |
| TNC | Team and Concepts (Hong Kong) |
| TNC | Third National Communication (UN) |
| TNC | Threaded Neil Concelman |
| TNC | Tarantella Native Client |
| TNC | Trusted Network Connect |
| TNC | Total Network Cost |
| TNC | Trade Negotiations Committee (Free Trade Area of the Americas) |
| TNC | Troponin C |
| TNC | The New Criterion (est. 1982; arts magazine) |
| TNC | Tokai Network Club (Japan) |
| TNC | Threaded Neill-Concelman (connector named for its inventors) |
| TNC | The Network Company (various locations) |
| TNC | Total Nonstructural Carbohydrates (vegetation) |
| TNC | Total Nucleated Cell |
| TNC | Trans-National Corporation (MNC) |
| TNC | Touch and Convert |
| TNC | Transnational Company |
| TNC | Tentative Non-Confirmation (employment verification; US DHS) |
| TNC | Tatter and Company (software; South Korea) |
| TNC | Troponin C, Cardiac |
| TNC | The Nordic Company (Denmark) |
| TNC | The Nation's Capitol |
| TNC | The Newsletter Company (Dallas, TX) |
| TNC | Transnational Competence |
| TNC | Terminal Node Control |
| TNC | Transit Node Clock (DSC) |
| TNC | The North Community (band) |
| TNC | Traditional Net Cost (insurance) |
| TNC | Transnational Consulting (trade group; France and Germany) |
| TNC | Trees Not Cars (San Francisco, CA) |
| TNC | The Nottingham Company |
| TNC | Total Number of Credits (scholastic record) |
| TNC | Theater Network Center |
| TNC | Thermal Neutron Counter |
| TNC | Trunk Node Control |
| TNC | Travel Network Coordinator |