- LAC
- Lidar-assisted control
- LACE
- levelized avoided cost of electricity
- LAI
- leaf area index
- LAT
- lowest astronomical tide 天文最低潮位
- LCOE
- levelized cost of electricity, levelized cost of energy 均等化発電原価
- L/D
- lift to drag ratio 揚抗比
- LE
- leading edge 前縁
- LES
- Large Eddy Simulation
- LF
- load factor
- LiDAR
- Light Detection and Ranging
- LILA
- Light Integrated Load Analysis 簡易統合荷重解析
- LIR
- low induction rotor
- LLJ
- low level jet 下層ジェット
- LOI
- Letter of Intent 趣意書
- LOS
- line of sight 視線
- LS
- least squares 最小二乗
- LTA
- lenders’ technical advisor
- LTC
- Long term correction 平年値補正