stand oil
highly viscous and thickened oily liquid, obtained by the polymerization (by boiling) of a seed oil, such as linseed oil, intended for use mainly in painting and glazing mediums, because, unlike raw oil, it tends not to yellow with aging
en-GB/ˈstænd ˈɔɪl/
en-US/ˈstænd ˈɔɪl/