Where does “単位系” come from?
単位系 (Japanese) comes from Japanese 単位, from Middle Chinese 單位.
単位系 (Japanese): a system of measurement
Ancestry of “単位系”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Japanese | 単位 | unit of measure; unit; academic credit |
| 2 | Middle Chinese | 單位 | — |