lead - link
- lenslike fiber
- lenticular martensite
- LEO-to-GEO transfer
- Leonov-Panasyuk-Dugdale model
- LEP
- LEPA system
- lepaigite
- lepeth sheath
- Leporello folding
- Leporello forms
- leptoquark
- LER
- LERC
- LES
- less-common metal
- lesson-learned data
- LET
- LET process
- let-through energy
- let-through shortcircuit current
- letch bumper head
- letch-up
- lethal burn
- lethal concentration
- letter balance
- letter blank
- letter book
- letter feed
- letter of acceptance
- letter of intent
- letter paper
- letter proposal to be accepted and signed by the owner
- letter sorter
- letter space
- letter spacing device
- letter upsetter
- letter-equivalent languages
- letter-into-sound rule
- letter-quality printing
- letter-shift signal
