hy·dri·od·ic acid /ˌhaɪdriˈɑdɪk-/
  hy·dri·od·ic acid /ˌhaɪdrɪˌɑdɪk-/ 名詞
  氫碘酸
  Hy·dri·od·ic a.  Chem. Pertaining to, or derived from, hydrogen and iodine; -- said of an acid (HI) produced by the combination of these elements.
  Hydriodic acid Chem., a pungent, colorless gas, HI, usually prepared as a solution in water. It is strong reducing agent. Called also hydrogen iodide.
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  hydriodic acid
       n : (HI) a colorless or yellow aqueous solution of hydrogen
           iodide; "hydriodic acid is a strong acid"