- Marriage (Roman law)1
- Masjid al-Aqṣá (Jerusalem)1
- Masjid al-Nabawī al-Sharīf1
- Mass1
- Materia medica, Vegetable1
- Mathematics, Greek1
- Mathematics, Medieval1
- Maḥbūbī, Maḥmūd ibn ʻUbayd Allāh, -1344 or 1345. Wiqāyat al-riwāyah fī masāʼil al-Hidāyah1
- Maḥbūbī, ʻUbayd Allāh ibn Masʻūd, -1346 or 1347. Wishāḥ fī al-maʻānī wa-al-bayān1
- Medical astrology1
- Medici, Alamanno de'1
- Medici, Bernardo de'1
- Medici, Niccolò de'1
- Medicine, Greek and Roman1
- Medicine, Persian1
- Medicine--Religious aspects1
- Mediterranean Sea1
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