Laue - lipe
- Lauenstein method
- laughing gas
- Laurence-Moon-Bardet-Biedl syndrome
- lavage
- law
- Law method
- law of definite composition
- law of dominance
- law of independent assortment
- law of initial value
- law of segregation
- law of specific nerve energies
- law of universal gravitation
- lawrencium
- lax
- laxative
- laxative regimen
- lay referral system
- lazy colon
- lazy leukocyte syndrome
