bone grease

Bone grease is a type of grease derived from animal parts, specifically from the fatty matter found within bones. This fatty matter is typically obtained by boiling, steaming, or extracting solvents from the bones.12

Bone grease has historically been used in the manufacture of candles, soap, and as a lubricant. It is a component of various greases, including those made from hog fat, beef, and mutton fats, as well as fleshing grease trimmed from hides. Bone oil, a related substance obtained from carbonizing bones, also has uses as a lubricant and in sheep dips.213