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 | Definition 
 
        | an organic compound that is not aromatic |  | 
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        | Term 
 | Definition 
 
        | Different forms of an element with different properties. ex: diamond, graphite, and fullerene |  | 
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        | Term 
 | Definition 
 
        | cyclic hydrocarbons with alternating single and double bonds |  | 
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        | Term 
 | Definition 
 
        | aromatic hydrocarbon based on benzene ring as a structural unit |  | 
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        | Term 
 | Definition 
 
        | any functional group or substituent derived from a simple aromatic ring |  | 
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        | Term 
 | Definition 
 
        | weak band around 250 or 270 nm in UV spectra of benzenoid aromatics |  | 
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        | Term 
 | Definition 
 
        | orbitals having the same energy |  | 
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        | Term 
 | Definition 
 
        | rings that share a common carbon-carbon bond and its two carbon atoms |  | 
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        | Term 
 | Definition 
 
        | a cyclic compound in which one or more of the ring atoms is not carbon |  | 
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        | Term 
 
        | polynuclear aromatic compounds |  | Definition 
 
        | aromatic compounds with two or more fused aromatic rings ex: naphthalene |  | 
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