Where does “螺旋形” come from?

螺旋形 (Japanese) comes from Japanese 形, from Middle Chinese 形.

螺旋形 (Japanese): a helix shape, a spiral shape

Definitions

  1. a helix shape, a spiral shape

Ancestry of “螺旋形”, step by step

螺旋形 traces back through two separate lines of ancestry.

via Japanese 形

StepLanguageWordMeaning
1Japanese形a shape; a form; a pattern, die, or model from...
2Middle Chinese形—

via Japanese 螺旋

StepLanguageWordMeaning
1Japanese螺旋a helix, a spiral; a screw
Every word from Middle Chinese 形 →Every word from Japanese 形 →