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 benzene ring 名詞
 苯環

 Ben·zene n.  Chem. A volatile, very inflammable liquid, C6H6, contained in the naphtha produced by the destructive distillation of coal, from which it is separated by fractional distillation. The name is sometimes applied also to the impure commercial product or benzole, and also, but rarely, to a similar mixed product of petroleum.
 Benzene nucleus, Benzene ring Chem., a closed chain or ring, consisting of six carbon atoms, each with one hydrogen atom attached, regarded as the type from which the aromatic compounds are derived. This ring formula is provisionally accepted as representing the probable constitution of the benzene molecule, C6H6, and as the type on which its derivatives are formed.
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 benzene ring
      n : a closed chain of 6 carbon atoms with hydrogen atoms
          attached [syn: benzene formula, benzene nucleus, Kekule
          formula]