| Term | Definition | Contributor | Modified |
|---|---|---|---|
| Yttrotungstite (Ce) | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Yttrotungstite (Y) | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Yuanfuliite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Yuanjiangite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Yuchi Indians | No definition provided | Christopher Rauch | 2023.12.01 |
| Yugawaralite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Yukonite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Yuksporite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Yuma Indians | No definition provided | Christopher Rauch | 2023.12.01 |
| Yuman Indians | No definition provided | Christopher Rauch | 2023.12.01 |
| Yunnan_Astronomical_Observatory | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Yurucari Indians | No definition provided | Christopher Rauch | 2023.12.01 |
| Yurunas Indians | No definition provided | Christopher Rauch | 2023.12.01 |
| Yushkinite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Yutchi Indians | No definition provided | Christopher Rauch | 2023.12.01 |
| Yvonite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| z | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Zabuyelite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Zacatecas, Mexico, Battle of, 1872 | No definition provided | Christopher Rauch | 2023.12.01 |
| Zaccagnaite | No definition provided | Ryan McGranaghan | 2023.04.16 |