Where does “渦虫” come from?

渦虫 (Japanese) comes from Japanese 渦, from Middle Chinese 渦.

渦虫 (Japanese): turbellarian

Definitions

  1. turbellarian

Ancestry of “渦虫”, step by step

渦虫 traces back through two separate lines of ancestry.

via Japanese

StepLanguageWordMeaning
1Japaneseeddy, swirl, whirlpool, vortex
2Middle Chinese

via Japanese

StepLanguageWordMeaning
1Japanesea bug, insect, worm; a serpent, snake; a worm
Every word from Middle Chinese Every word from Japanese