Petroleum fluid derived from naphthenic crude oil characterized by its paraf‚fin ring structure.

A type of petroleum fluid derived from naphthenic crude oil, containing a high proportion of closed-ring methylene groups.

High in naphthene-ring content. Lower than ordinary paraffins concentration. In some casual applications this adjective tacitly embraces aromatics as well as naphthenes, as in naphthenic naphtha.