LRTI
| Acronym | Definition |
|---|---|
| LRTI | Lower Respiratory Tract Infections |
| LRTI | Lower Respiratory Tract Illness |
| LRTI | Ligament Reconstruction Tendon Interposition |
| LRTI | Legal Research and Training Institute (est. 1949; Ministry of Justice; South Korea) |
| LRTI | Long Range Thermal Imaging |
| LRTI | Lodging, Restaurant and Tourism Index (Purdue University; Indiana) |