%degras%

‖/mhw>, n. [ F.; cf. F. gras, a. & n., fat. ] A semisolid emulsion produced by the treatment of certain skins with oxidized fish oil, which extracts their soluble albuminoids. It was formerly solely a by-product of chamois leather manufacture, but is now made for its own sake, being valuable as a dressing for hides. [ Webster 1913 Suppl. ]