| Abbreviation | Definition |
|---|---|
| LR | Load To Register |
| LR | Lactated Ringers |
| LR | Lactated Ringer's solution |
| LR | Linear Relaxation |
| LRB | Liquid Rocket Booster |
| LRCO | Limited Remote Communications Outlet |
| LRCP | Licensed Respiratory Care Practitioner |
| LRD | Load Random Data |
| LRD | Licensed Registered Dietitian |
| LRE | Linguistic Research And Engineering |
| LREC | Local Research Ethics Committee (UK) |
| LRF | Leukemia Research Fund |
| LRF | Leukaemia Research Fund ( U K) |
| LRF | Liver Residue Factor |
| LRFA | Lymphoma Research Foundation of America |
| LRM | Language Reference Manual |
| LRM | Learning Response Mode |
| LRM | Litigation Risk Management |
| LRM | Large Rifle Magnum |
| LRMS | Long Run Marginal Cost |
| LRQ | Lower right quadrant |
| LRSF | Lactating Rat Serum Factor |
| LRSI | Low-temperature Reusable Surface Insulation |
| LRT | Lower respiratory tract |
| LRT | Lobster Repair Technician |
| LRV | Leak Repair Verification |
| LS | Level Subroutine |
| LS | Load Save |
| LS | Load and Save |
| LS | Liver And Spleen |
| LS | Lumbar Spine |
| LS | Lumbosacral |
| LS | Lifespan Setting |
| LS | Lung Sound |
| LS | Land Surveyor |
| LS | Liquid Scintillation |
| LS-BMD | Lumbar Spine Bone Mineral Density |
| LSA | Lysergic Acid |
| LSA | Last Section Altered |
| LSA | Landscape Sensitivity Assessment |
| LSA | Local Security Assistant |
| LSAC | Law School Admission Council |
| LSB | Least Significant Bit |
| LSC | Liquid Scintillation Counting |
| LSCSW | Licensed Specialist Clinical Social Worker |
| LSD | Lysergic Acid Diethylamide |
| LSD | Last Stage Of Delirium |
| LSE | Local Security Environment |
| LSE | Ludhiana Stock Exchange |
| LSF | Lovely Skin Formula |