| Abbreviation | Definition |
|---|---|
| KWO | KiloWatt Output |
| KWT | Kilo-Watt Tons |
| L | 50 |
| L | Lambert |
| L | length |
| L | Liter |
| L | Liters |
| l | Litre[s] (symbol sometimes scriptive, or capital, to avoid confusion with 'one') |
| L | Long |
| l. | leaf |
| L/D | Length to Diameter Ratio |
| L/DAY | Liters Per Day |
| L/H | Liters per Hour |
| L/S | Liters Per Second |
| L/SEC | Liters Per Second |
| LbF | Pounds Force |
| LBH | Length, Breadth, Height |
| LbPG | Pounds Per Gallon |
| LBS | Pounds |
| LCH | Lost Customer Hours |