- Mathematical recreations1
- Mathematics, Greek1
- Mathematics, Jewish1
- Maximus, of Turin, Saint, active 4th century-5th century1
- Maʻariv1
- Meat inspection (Jewish law)1
- Medea, consort of Aegeus, King of Athens (Mythological character)1
- Medici, Alessandro de', 1510-15371
- Medici, Andrea de'1
- Medici, Carlo de'1
- Medici, Fabrizio de'1
- Medicine, Ancient1
- Medicine, Magic, mystic, and spagiric1
- Memory1
- Mensural notation1
- Mercy1
- Merit (Jewish theology)1
- Messiah--Judaism1
- Meteorologica (Aristotle)1
- Meteorology1