Etymology

tensan

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Today it means: A silk produced by the Japanese oak silkmoth (Antherea yamamai). Full definition →

Japanese 天蚕
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The story

  1. Japanese · borrowed from天蚕“tensan moth; tensan silk”
  2. English todaytensan

From Japanese 天蚕 (tensan, “tensan moth; tensan silk”).

Etymology from Wiktionary, CC BY-SA 4.0.