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Webster 1913 Edition

Noun.

[L.

undecim

eleven.]

(Chem.)

A liquid hydrocarbon,

C11H24

, of the methane series, found in petroleum; – so called from its containing eleven carbon atoms in the molecule.

See also: undécane

undecane ‎(plural undecanes)

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

organic compound