n. [ Gr. e'i`kosi. ] (Chem.) A solid hydrocarbon, C20H42, of the paraffin series, of artificial production, and also probably occurring in petroleum. [ 1913 Webster ]

n. [ Hex- + eikosane. ] (chem.) A hydrocarbon, C26H54, resembling paraffine; -- so called because each molecule has twenty-six atoms of carbon. [ Written also hexacosane. ] [ 1913 Webster ]

n. [ Tetra- + Gr. &unr_; twenty. ] (Chem.) A hydrocarbon, C24H50, resembling paraffin, and like it belonging to the marsh-gas series; -- so called from having twenty-four atoms of carbon in the molecule. [ 1913 Webster ]

n. [ Pref. tri- + Gr. &unr_; twenty. ] (Chem.) A hydrocarbon, C23H48, of the methane series, resembling paraffin; -- so called because it has twenty-three atoms of carbon in the molecule. [ 1913 Webster ]