Encyclopedias, Almanacs, Transcripts, and Maps
- Leptodactylid Frogs: Leptodactylidae
- Leptostracans: Phyllocarida
- Leri-Weill dyschondrosteosis
- Leroy Gordon Cooper
- Leroy, Olivier-Gilbert (1884-?)
- Lescoriere, Marie (fl. sixteenth century)
- LeShan, Lawrence (L.) (1920-)
- Leslie, Desmond (Peter Arthur) (1921-)
- Leukodystrophy
- Leukodystrophy
- Lev Semenovich Pontryagin
- Levensita
- Leventhal, Herbert (1941-)
- Leverrier, Adams, and the Mathematical Discovery of Neptune
- Levetiracetam
- Levi ben Gershom
- Levi Ben Gershom
- Lévi, Éliphas (1810-1875)
- Levinas, Emmanuel
- Leviticon