| LCAO | linear combination of atomic orbitals |
|---|---|
| LD | labor and delivery; laboratory data; labyrinthine defect; lactate dehydrogenase; laser Doppler; lear... |
| LDA | laser Doppler anemometry; left dorso-anterior [fetal position]; linear discriminant analysis; lympho... |
| LET | lidocaine, epinephrine, and tetracaine [solution]; linear or low energy transfer |
| LFER | linear free-energy relationship |