Etymology

todorokite

T1O1D2O1R1O1K5I1T1E1

Today it means: A manganese oxide mineral, also containing calcium, barium, potassium, sodium, and sometimes magnesium that is a major constituent of manganese nodules Full definition →

Japanese 轟
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The story

  1. Japanese · borrowed from轟“boom, rumble; sound of thunder”
  2. English todaytodorokite

From Japanese 轟 (todoroki, “boom, rumble; sound of thunder”) + -ite, after Todoroki Mine (轟鉱山) in Shiribeshi, Hokkaido where it was discovered.

Etymology from Wiktionary, CC BY-SA 4.0.