Encyclopedias, Almanacs, Transcripts, and Maps
- motorcycle racing
- Moundbuilders (Megapodiidae)
- Mount Pinatubo
- Mountain Beavers (Aplodontidae)
- mountain lion
- Mountbatten, Louis, 1st Earl Mountbatten of Burma
- Mouse-Tailed Bats (Rhinopomatidae)
- Moustached Bats (Mormoopidae)
- movable christian feasts
- Movement for the Restoration of the Ten Commandments of God
- Mozi
- Mu?ammad
- Mu?ammad A?mad
- Mu?tazilah
- Mudnest Builders (Grallinidae)
- Mudr?
- muezzin
- Muguliformes (Mullets)
- Muir, John (1838 – 1914) American Naturalist and Writer
- Muisca Religion