- lead bath
- lead burning
- lead chamber
- lead foil
- lead glass
- lead joint
- lead mater
- lead monoxide
- lead naphthenate
- lead oleate
- lead oxide
- lead pipe
- lead screen
- lead sensitivity
- lead sulfide
- lead sulphide
- lead tetroxide
- lead wool
- lead-bearing
- leaded gasoline
- leaf gneiss
- leak loss
- leallite
- lean coke
- lease storage
- leased acreage
- leather
- leather packing
- leathery state
- Lee configuration
- lee side
- leeward
- legal oil
- lemon chrome
- lemon oil
- lepidolite
- leptothermal deposit
- lerminal clamp
- Lessing ring
- lessingite
- lethal concentration
- lettsomite
- leutic environment
- level alarm
- level cock
- level disturbance
- level pillar
- leveling instrument
- levelling rod
- levelling staff
- lever engine
- lever shears
- lever valve
- levulinic
- liassis
- liberation
- lie key
- life
- lean coal
- lease bonus
- lectotype
- legal department
- lenticular sand
- lenticular structure
- lenticular twin
- lepidoblastic texture
- lepidomelane
- leptynite
- lestiwarite
- lethal agent
- lethal index
- letter
- level country
- level differential
- level seam
- leveling color
- leveling screw
- leveling survey
- levelling box
- levelling peg
- levelling rule
- Levenstein process
- lever brake
- lever press
- levulosan
- lherzolite
- licence block
- license block
- lichen
- licorice
- Liebig condenser
- life hazard
- life interest
- life line
- life saver
- life test
- lift
- lift off
- lift pump
- lifting chain