| Abbreviation | Definition |
|---|---|
| LCH | LatCH |
| LCH | LaunCH |
| LCHTF | Low Cycle High Temperature Fatigue |
| LCL | LoCaL |
| LCL | Local Current Limiter |
| LCM | Least Common Multiple |
| LCMS | Low Cost Modular Spacecraft |
| LCO | Launch Control Officer |
| LCO | Lunar Crescent Observation |
| LCOM | Logic Control Output Module |
| LCR | Low Cross Range |
| LCS | Laser Communications System |
| LCS | Launch Communication Satellite |
| LCS | Launch Control System |
| LCS | List of Command Signals |
| LCT | Launch Control Trailer |
| LCU | Line Coupling Unit |
| LCUG | Liquid Cooling UnderGarment |
| LCVG | Liquid Cooling and Ventilation Garment |
| LD | Lateral Direction |