有ゆう機き水すい銀ぎん中ちゅう毒どく

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Meanings

organic mercury poisoning

Medical and environmental term for poisoning caused by organic mercury compounds, such as methylmercury. Often associated with Minamata disease.

水みな俣また病びょう
Minamata disease is a specific neurological syndrome caused by severe methylmercury poisoning, historically linked to industrial pollution in Minamata, Japan. 有機水銀中毒 is the broader medical term for poisoning by organic mercury compounds.
水すい銀ぎん中ちゅう毒どく
General mercury poisoning, which includes both inorganic and organic mercury poisoning. 有機水銀中毒 specifically refers to poisoning from organic mercury compounds.

Compound of 有機 (organic), 水銀 (mercury), and 中毒 (poisoning). The term is a direct calque from English 'organic mercury poisoning'.