Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of several cycloalkane hydrocarbons having the general formula CnH2n and found in various petroleums.

from The Century Dictionary.

  • noun In organic chemistry, a class-name of a series of hydrocarbons derived from hexahydrobenzene (cyclohexane), C6H12. Many of them may be made synthetically, and a considerable number are found in petroleum, especially in that from the Baku district.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Chem.) A peculiar hydrocarbon fraction occuring as an ingredient of some crude petroleums, mostly mixtures of derivatives of the five- and six-membered saturated cyclic alkanes, cyclopentane and cyclohexane, having the general formula CnH2n.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun organic chemistry Any cycloalkane (or alkyl derivative).

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[naphth(a) + –ene.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

naphtha +‎ -ene

Examples

  • Depending on the properties of the naphtha feedstock (as measured by the paraffin, olefin, naphthene, and aromatic content) and catalysts used, reformates can be produced with very high concentrations of toluene, benzene, xylene, and other aromatics useful in gasoline blending and petrochemical processing.

    Cracking

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