- linear array
- linear decrease
- linear density
- linear effect
- linear expansivity
- linear increase
- linear law
- linear macromolecule
- linear magnification
- linear manifold
- linear motor
- linear network
- linear relation
- linear taper
- linearity condition
- link coupling
- linkage
- liquefied gas
- liquefied helium
- liquefier cycle
- liquid A1
- liquid accumulator
- liquid air
- liquid B
- liquid channel
- liquid chiller
- liquid entrainment
- liquid fluorine
- liquid freezant
- liquid gas
- liquid head
- liquid helium
- liquid helium-3
- liquid hydrogen
- liquid level
- liquid precooling
- liquid seal
- liquid sorbent
- liquid supply
- lithium chloride
- link box
- liquefaction step
- liquefying equipment
- liquid bleed
- liquid churning
- liquid cooling
- liquid density
- liquid entropy
- liquid feed
- liquid fraction
- liquid freezing
- liquid header
- liquid hydrocarbon
- liquid injection
- liquid leg
- liquid line
- liquid main
- liquid spillover
- liquid strainer
- liquid subcooling
- liquid thermostat
- liquid turbulence
- liquid waste
- lithium bromide
- load allowance
- load calculation
- load compartment
- load curve
- load divider
- load line
- load loss
- load power
- load regulation
- loaded compressor
- loaded line
- loaded starting
- loading coil
- loading frequency
- loading section
- loading space
- lobe
- lobe penetration
- local field
- local hypothermia
- locality
- localizer
- liquefaction pressure
- liquefaction yield
- liquefier
- liquefying cycle
- liquid A
- liquid addition
- liquid bypassing
- liquid charge
- liquid circulation
- liquid cryogen
- liquid distribution
- liquid enthalpy
- liquid height
- liquid indicator