pic·ric acid /ˈpɪkrɪk-/
  pic·ric acid /ˌpɪkrɪk-/ 名詞
  苦味酸,2,4,6-三硝基苯酚
  Ni·tro·ph·nol n.  Chem. Any one of a series of nitro derivatives of phenol.  They are yellow oily or crystalline substances and have well-defined acid properties, as picric acid.
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  picric acid
       n : a yellow toxic highly explosive strong acid; used in high
           explosives and as a dye and in chemical reactions