fluorine
The process of debarbarizing.
(uncountable) The chemical element (symbol F) with an atomic number of 9. It is the lightest of the halogens, a pale yellow-green, highly reactive gas that attacks all metals.
Third-person singular simple present indicative form of substantify
(euphemistic, dated) A mentally retarded person who can be trained or taught.
フッ素は非常に反応性が高いため、微量でも金属を急速に腐食させることがあり、特殊な装置で細心の注意を払って取り扱う必要があります。
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