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2 definitions found
 for Benzene nucleus
From The Collaborative International Dictionary of English v.0.48 :

  Benzene \Ben"zene\, n. [From Benzoin.] (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.
     [1913 Webster]
  
     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.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

  benzene nucleus
      n 1: a closed chain of 6 carbon atoms with hydrogen atoms
           attached [syn: benzene formula, benzene ring, benzene
           nucleus, Kekule formula]

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