| Abbreviation | Definition |
|---|---|
| LE1 | Longeron Elevator 1 |
| LENR | Low Energy Nano Reaction |
| LF | Lateral Force |
| LFE | Low-Frequency Effect |
| LFMT | Laboratory of Fluid Mechanics and Turbomachinery |
| LFMT | Laboratory of Fluid Mechanics Turbomachinery |
| LFSN | Linear Fractional Stable Noise |
| LITMO | Leningrad institute of mechanics and optics |
| LRBU | Link Reserved Bandwidth Utilization |
| LTBE | Laplace Transform Boundary Elements |
| LULA | Limited Use Limited Application |
| M.I.MECH.E | Member of the Institution of Mechanical Engineers |
| MAML | Mechanics of Advanced Materials Laboratory |
| MARVS | Maximum Allowed Relive Valve Setting |
| MASD | Mechanicsburg Area School District |
| MAU | Make-up Air Unit |
| MAWP | Maximum Allowed Working Pressure |
| MAWT | Maximum Allowed Working Temperature |
| MBBM | Mechanics of Biological and Bioinspired Materials |
| MBFP | Main Boiler Feedwater Pump |