low- - mann
- low-accident-risk
- low-altitude ejection
- low-fidelity (visual) display
- low-frequency noise
- low-frequency oscillation
- low-G centrifuge
- low-level ejection
- low-level exploration
- low-level maneuver
- low-level weather
- low-pitched noise
- low-pitched tone
- low-pressure chamber
- low-realism simulator
- low-sensory environment
- low-skilled
- low-temperature exploration
- low-time pilot
- low-torque tool
- low-visibility landing
- lower arm circumference
- lower body
- lower body negative pressure
- lower body negative pressure device
- lower body negative pressure test
- lower lecture
- lower limb counterpressure
- lower limb fracture
- lower restraints
- lower thigh circumference
- lower-body
- LSA
- LT
- LTM
- lumbar cord
- lumbar neuralgia
- lumbar reflex
- lumbodorsal spine
- lumbosacral spine
- luminance adaptation
