The Collaborative International Dictionary
Tetrakosane
Tetrakosane \Tet"ra*ko*sane`\, n. [Tetra- + Gr. ? 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.
Wiktionary
tetrakosane
n. (alternative spelling of tetracosane English)