hydrogen cyanide 名詞
  氰化氫
  Hy·dro·cy·an·ic a.  Chem. Pertaining to, or derived from the combination of, hydrogen and cyanogen.
  Hydrocyanic acid Chem., a colorless, mobile, volatile liquid, HCN, having a characteristic peach-blossom odor. It is one of the most deadly poisons. It is made by the action of sulphuric acid on yellow prussiate of potassium (potassium ferrocyanide), and chemically resembles hydrochloric and hydrobromic acids. Called also prussic acid, hydrogen cyanide, etc.
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  hydrogen cyanide
       n : a highly poisonous gas or volatile liquid that smells like
           bitter almonds; becomes a gas at around 90 degree
           fahrenheit and is most dangerous when inhaled; the
           anhydride of hydrocyanic acid; used in manufacturing