| Term | Definition | Contributor | Modified |
|---|---|---|---|
| Lyso-form | No definition provided | Christopher Rauch | 2023.12.01 |
| Lysoform | No definition provided | Christopher Rauch | 2023.12.01 |
| M | The ratio of the maximum frequency reflected once from an ionospheric layer over a 3000 km range to the critical frequency of the layer. | Ryan McGranaghan | 2023.04.16 |
| m1 class | No definition provided | Ryan McGranaghan | 2023.04.16 |
| m2 class | No definition provided | Ryan McGranaghan | 2023.04.16 |
| m3 class | No definition provided | Ryan McGranaghan | 2023.04.16 |
| m4 class | No definition provided | Ryan McGranaghan | 2023.04.16 |
| m5 class | No definition provided | Ryan McGranaghan | 2023.04.16 |
| m6 class | No definition provided | Ryan McGranaghan | 2023.04.16 |
| m7 class | No definition provided | Ryan McGranaghan | 2023.04.16 |
| m8 class | No definition provided | Ryan McGranaghan | 2023.04.16 |
| m9 class | No definition provided | Ryan McGranaghan | 2023.04.16 |
| maastrichtian | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Macadamized roads | No definition provided | Christopher Rauch | 2023.12.01 |
| Macaroni | No definition provided | Christopher Rauch | 2023.12.01 |
| Macaronic literature | No definition provided | Christopher Rauch | 2023.12.01 |
| Macaronic literature--Bibl | No definition provided | Christopher Rauch | 2023.12.01 |
| Macaroni wheat | No definition provided | Christopher Rauch | 2023.12.01 |
| Macaulayite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Macdonaldite | No definition provided | Ryan McGranaghan | 2023.04.16 |