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 prus·sic acid /ˌprəsɪk-/ 名詞
 氫氰酸,氰酸

 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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 prussic acid
      n : a solution of hydrogen cyanide in water; weak solutions are
          used in fumigating and in the synthesis of organic
          compounds [syn: hydrocyanic acid]