hydrofluoric acid
(chemistry) A solution of hydrogen fluoride, HF, in water; it is a weak but very corrosive acid, used in the production of fluorine compounds, and in metallurgy.
A system of philosophy, chiefly ethics, based upon the teachings of Epicurus (c. 340–c. 270 BC), that advocated retreat from public life to preserve one's long-term happiness and ataraxia.
Third-person singular simple present indicative form of frontolyze
Synonym of water-rate
実験室での事故で、少量のフッ化水素（HF）の水溶液がこぼれ、直ちに除染と専門的な医療処置が必要になった。
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