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An organic oil, such as linseed oil, used as a binder in paints and varnishes. It dries into a tough elastic layer when applied in a thin film and exposed to air.
(Chemical Engineering) one of a number of animal or vegetable oils, such as linseed oil, that harden by oxidation on exposure to air: used as a base for some paints and varnishes
any of a group of oily, organic or synthetic liquids, as linseed oil, that when applied as a thin coating absorb atmospheric oxygen, forming a tough, elastic layer.