the dark wax or grease obtained when fish-oils are rubbed into hides and recovered by expression and by washing the hides with alkali, as in the manufacture of chamois leather; the commercial product usu. contains added quantities of fish-oils and solid fats, and is used in currying and fat-liquoring leather; also, a product made from fish-oils in imitation of this, U.S. the crude mixture of wax and fatty acids obtained by scouring wool or treating it with organic solvents, used industrially (e.g. as a source of lanolin and in the manufacture of lubricating greases) and as a substitute for degras (sense a) in leather manufacture; wool-grease, wool-fat, parkerasv, hapendunud kalarasv (rääs), tarvitatakse nahkade parkimisel naha määrimiseks