Where does “石炭紀” come from?
石炭紀 (Japanese) comes from Japanese 石炭, from Japanese 石, from Middle Chinese 石.
Ancestry of “石炭紀”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Japanese | 石炭 | coal |
| 2 | Japanese | 石 | a stone; a transistor; a traditional Japanese... |
| 3 | Middle Chinese | 石 | — |