Encyclopedias, Almanacs, Transcripts, and Maps
- Mohs' Scale
- Mohs' Scale
- Mohs’ Scale
- Mole Salamanders: Ambystomatidae
- Mole-Limbed Wormlizards: Bipedidae
- Mole-Rats
- Mole-Rats
- Molecular Biology and Molecular Genetics
- Molecular Formula
- Molecular Formula
- Moleoscopy
- Moles, Shrew Moles, and Desmans: Talpidae
- Molina, Mario (1943- )
- Molybdomancy
- Mompesson, John (ca. 1662)
- Monarch Flycatchers
- Monarch Flycatchers
- Monarch Flycatchers: Monarchidae
- Monck, Rev. Francis Ward (ca. 1878-?)
- Mondino dei Liucci