- lumped impedance
- lumped load
- lumped loading
- lumped parameter
- lunar
- lunar corona
- lunar landing
- lunate
- lunation
- Lundquist parameter
- Luneberg lens
- Luneburg lens
- luster
- lusterless
- lustre
- Lyman ghost
- lyophilisate lyophilization
- macrograph
- macrosonics
- Madelung constant
- magcard
- magic lantern
- magnet coil
- magnet shunt
- magnetic ageing
- magnetic anisotropy
- magnetic azimuth
- magnetic blowout
- magnetic card
- magnetic circuit
- magnetic confinement
- magnetic cooling
- magnetic damping
- magnetic flowmeter
- magnetic latch
- magnetic leakage
- magnetic material
- magnetic memory
- magnetic multipole
- magnetic pendulum
- magnetic pole
- magnetic rigidity
- magnetic saturation
- magnetic shielding
- magnetic shunt
- magnetic switch
- magnetizable
- magnetization characteristic
- magnetizing
- magnetocaloric
- magnetochemistry
- magnetoelastic magnetometer
- magnetoelectric generator
- magnetoelectricity
- magnetogalvanic effect
- magnetohydrodynamic interaction
- magnetoplasmadynamic generator
- magnetostatic
- magnetostatic lens
- magnetostatics
- magnetostrictive component
- magnetostrictive effect
- magnetostrictive vibrator
- magnico
- magnifier
- magnistor
- magnitude
- main sequence
- main transformer
- maintenance
- major axis
- lyophilization tunnel
- Mach angle
- Machmeter
- macroscopic magnetization
- macroscopic property
- macroselsm
- macrosystem
- magic
- magic number
- magic tee
- magnalium
- magnesite
- magnesium anode
- magnet keeper
- magnet wire
- magnetic anneal
- magnetic axis
- magnetic bar
- magnetic bias
- magnetic compressor
- magnetic construct
- magnetic energy
- magnetic focusing
- magnetic gasket
- magnetic hysteresis
- magnetic lag
- magnetic link
- magnetic oscillograph
- magnetic prospecting