Where does “電流計” come from?

電流計 (Japanese) comes from Japanese 計, from Middle Chinese 計.

電流計 (Japanese): ammeter

Definitions

  1. ammeter

Ancestry of “電流計”, step by step

電流計 traces back through two separate lines of ancestry.

via Japanese 計

StepLanguageWordMeaning
1Japanese計plan, total; -meter
2Middle Chinese計—

via Japanese 電流

StepLanguageWordMeaning
1Japanese電流electric current
Every word from Middle Chinese 計 →Every word from Japanese 計 →