NASA Abbreviations and Acronyms

1. LED
   Light Emitting Diode
2. LED
   Light-Emitting Diode
3. LEDC
   Low-Energy Detonating Charge
4. LEFM
   Linear Elasticity Fracture Mechanics
5. LEH
   Launch/Entry Helmet
6. LEH
   launch and entry helmet
7. LEID
   Low-Energy Ion Detector
8. LEM
   Laboratory Environment Model
9. LEN
   Length
10. LEO
    Low Earth Orbiting
11. LEP
    large external pressurized
12. LER
    Long Eye Relief (optics)
13. LERC
    Lewis Research Center
14. LERC
    Lewis Research Center (cleveland
15. LES
    Leading Edge Subsystem
16. LESS
    Leading Edge Subsystem
17. LESS
    Leading Edge Structure Subsystem
18. LET
    Linear Energy Transfer (in Spacecraft Power Systems)
19. LETF
    Launch Equipment Test Facility
20. LETF
    Launch Equipment Test Facility (ksc)

Last updated: May 6, 2025 — Total entries: 14,020