| Term | Definition | Contributor | Modified |
|---|---|---|---|
| Mesozoic period | No definition provided | Christopher Rauch | 2023.12.01 |
| mesozooplankton | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Mess | No definition provided | Christopher Rauch | 2023.12.01 |
| Messelite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Messenger | No definition provided | Ryan McGranaghan | 2023.04.16 |
| MESSENGER__FIPS | No definition provided | Ryan McGranaghan | 2023.04.16 |
| MESSENGER__MAG | No definition provided | Ryan McGranaghan | 2023.04.16 |
| MESSENGER__XRS | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Messiah | No definition provided | Christopher Rauch | 2023.12.01 |
| Messina--Earthquake, 1908 | No definition provided | Christopher Rauch | 2023.12.01 |
| Messing | No definition provided | Ryan McGranaghan | 2023.04.16 |
| messinian | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Me stars | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Me stars | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Me stars | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Meta-aluminite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Meta-alunogen | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Meta-ankoleite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Meta Autunite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Metaberyllite | No definition provided | Ryan McGranaghan | 2023.04.16 |