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 ]