Encyclopedias, Almanacs, Transcripts, and Maps
- Max Josef von Pettenkofer
- Max Noether
- Maxie Anderson
- Maxim Kontsevich
- Maxima and Minima
- Maxima and Minima
- Maximos Planudes
- Maxwell, Joseph (ca. 1933)
- May French Sheldon
- May, Luke Sylvester
- Mayan Temples
- Mayavi-rupa
- Mayflies: Ephemeroptera
- Maynard, Henrietta Sturdevant (1841-1892)
- Mayne, Alan James (1927-)
- Mayo Clinic Diet (Fad Diet)
- Mayo Clinic Plan (Endorsed by Clinic)
- Mazdaznan Temple Association
- MCAD deficiency
- MCAD Deficiency