naph·tho·qui·none /ˌnæfθəkwɪnˈon, ˌnæp, ˈkwɪnˌon/ 名詞
  奈昆
  Naph·tho·qui·none n.  Chem. A yellow crystalline substance, C10H6O2, analogous to quinone, obtained by oxidizing naphthalene with chromic acid.
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  naphthoquinone
       n : a fat-soluble vitamin that helps in the clotting of blood
           [syn: vitamin K, antihemorrhagic factor]