| Term | Definition | Contributor | Modified |
|---|---|---|---|
| RGU photometry | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Rhabdite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Rhabdophane (Ce) | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Rhabdophane (La) | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Rhabdophane (Nd) | No definition provided | Ryan McGranaghan | 2023.04.16 |
| rhaetian | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Rhaeto-Romanic | No definition provided | Christopher Rauch | 2023.12.01 |
| Rhagoletis cingulata | No definition provided | Christopher Rauch | 2023.12.01 |
| Rhatany | No definition provided | Christopher Rauch | 2023.12.01 |
| Rhea | The second-largest moon of Saturn and theninth-largest moon in the Solar System. | Ryan McGranaghan | 2023.04.16 |
| Rheniite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Rhenium | No definition provided | Ryan McGranaghan | 2023.04.16 |
| rheology | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Rheology and friction of fault zones | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Rheology and friction of fault zones | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Rheology: crust and lithosphere | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Rheology: crust and lithosphere | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Rheology: general | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Rheology: general | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Rheology: mantle | No definition provided | Ryan McGranaghan | 2023.04.16 |