Oil 8 : Any of the various greasy, combustible substances that are obtained from animal, vegetable, and mineral matter, liquid at ordinary temperatures, and soluble in certain organic solvents, though not in water
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}