| Meteorit | meteorite |
| Meteor | meteor |
| Metformin | metformin |
| Metabolit | metabolite |
| Meter | meter metre |
| Methodik | methodology method |
| Methodist | Methodist |
| Metrik | metric |
| Beterin | prayer |
| Eternit | slate |
| Mieterin | tenant |
| M-Theorie | M-theory |
| Mentorin | mentor |
| Motorik | motor skill |
| -metrie | -metry |
| Ametrin | ametrine |
| Memetik | memetics |
| Metamorphit | metamorphic rock |
| Method | Methodius |
| Metis | Metis |