| Abbreviation | Definition |
|---|---|
| LLG | Landau-Lifshitz-Gilbert equation |
| LLLV | Low Level Light Vision |
| LLSRT | Library for Lens System Ray Tracing (physics) |
| LM | Light Meter |
| LM | Linear Metre |
| LM | Lumen |
| LMA | Large Mode Area |
| LMDAD | Linear Magnetic Dichroism in the Angular Distribution |
| LMFC | Liquid Mass Flow Controller |
| LMI | Least Moment of Inertia |
| LMP | Letters in Mathematical Physics |
| LMPT | Laboratory of Metal Physics and Technology |
| LMT | Load and Motion Transfer |
| LMU | Location Measurement Unit |
| LNLS | Brazilian Synchrotron Light Laboratory |
| LNLS | National Synchrotron Light Laboratory (Brazil) |
| LNP | Lecture Notes in Physics |
| LNV | Lepton-Number Violating |
| LOA | Law Of Attraction |
| LOCA | LOngitudinal Chromatic Aberration |