n. [ Gr. &unr_; eleven. ] (Chem.) One of the higher hydrocarbons of the paraffin series, C11H24, found as a constituent of petroleum. [ Written also hendecane. ] [ 1913 Webster ]

n. [ Gr. "e`ndeka eleven.] (Chem.) A hydrocarbon, C11H24, of the paraffin series; -- so called because it has eleven atoms of carbon in each molecule. Called also endecane, undecane. [1913 Webster]