Where does “三次元” come from?

三次元 (Japanese) comes from Japanese 三, from Middle Chinese さん.

三次元 (Japanese): three dimensions; the third dimension

Definitions

  1. three dimensions; the third dimension

Ancestry of “三次元”, step by step

三次元 traces back through two separate lines of ancestry.

via Japanese 三

StepLanguageWordMeaning
1Japanese三three, 3; third; three
2Middle Chineseさん—

via Japanese 次元

StepLanguageWordMeaning
1Japanese次元a dimension
Every word from Middle Chinese さん →Every word from Japanese 三 →