Oil made from the foot and shin bones of cattle that is used as leather dressing. It has a flash point of 4700F, ignition temperature of 8280F, and is subject to spontaneous heating.
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}