• (n.) A peculiar hydrocarbon occuring as an ingredient of Caucasian petroleum. • (n.) A peculiar hydrocarbon occuring as an ingredient of Caucasian petroleum. Found on http://thinkexist.com/dictionary/meaning/naphthene/
any of a group of hydrocarbon ring compounds of the general formula, CH, derivatives of cyclopentane and cyclohexane, found in certain petroleums. Found on https://www.infoplease.com/dictionary/naphthene