Pentadecane :: Pentadecane (n.) A hydrocarbon of the paraffin series, (C15H32) found in petroleum, tar oil, etc., and obtained as a colorless liquid; -- so called from the fifteen carbon atoms in the molecule..
Pentadecatoic :: Pentadecatoic (a.) Of, pertaining to, or derived from, pentadecane, or designating an acid related to it..