from The Century Dictionary.

  • noun A colorless hydrocarbon, CH3(CH2)9CH3, of the methane series, prepared by the action of hydriodic acid and phosphorus on undecylic acid. It melts at -26.5° C. and boils at 194.5° C. Also called hendecane and normal undecane.

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

  • noun (Chem.) A liquid hydrocarbon, C11H24, of the methane series, found in petroleum; -- so called from its containing eleven carbon atoms in the molecule.

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

  • noun organic chemistry Any of many isomers of the aliphatic hydrocarbon having 11 carbon atoms, but especially n-undecane CH3(CH2)9CH3


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