| Abbreviation | Definition |
|---|---|
| LGM | Last Glacial Maximum |
| LH | Low High |
| LIDAR | Light Detecting And Ranging |
| LIE | Line Islands Experiment |
| LIPI | Indonesian Institute of Sciences |
| LIPI | Lembaga Ilmu Pengetahuan Indonesia (Indonesian Institute of Sciences) |
| LISA | Leading Interconnect Systems Approach |
| LISCR | Liberia Ship Corporate Registry |
| LISD | Library and Information Services Division |
| LLBL | Low-Latitude Boundary Layer |
| LLJ | Low Level Jet |
| LLWAS | Low Level Windshear Alert System |
| LMA | Low Mositure Affinity |
| LMAC | Local Marine Advisory Committee |
| LME | Large Marine Ecosystem |
| LMER | Land Margin Ecosystem Research |
| LMR | Living Marine Resource |
| LMTD | Logarithmic Mean Temperature Difference |
| LNG | Liquified Natural Gas |
| LO | Line Office |