Caustic soda - Caustic soda

Japanese: 苛性ソーダ - かせいソーダ

〘Noun〙 (Soda is "soda") 1. Common name for sodium hydroxide. Chemical formula: NaOH. White solid. Industrially, it is usually produced by electrolyzing salt water. Highly deliquescent, it easily combines with carbon dioxide. A highly poisonous substance. In addition to making soap, it is used widely as an industrial raw material in artificial fibers, chemicals, etc. (Seimi Kaisou (1837-47)) 2. A teacher who is strict when grading papers. A catchphrase among fellow students. (Modern Japanese Dictionary (1932))

Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information

Japanese:

〘名〙 (ソーダはsoda)① 水酸化ナトリウムの通称。化学式 NaOH 白色の固体。工業的には、ふつう食塩水の電解によって製造される。潮解性に富み、二酸化炭素と化合しやすい。劇薬。石鹸の製造のほか、人造繊維、化学薬品など、工業原料として広範囲に使用される。〔舎密開宗（1837‐47）〕② 採点の辛い先生のこと。学生仲間の流行語。〔現代語大辞典（1932）〕

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