ボイル油ゆボイルゆMeanings1nounboiled oilTechnical term for linseed oil or similar drying oils that have been heated to improve drying properties, used in paints and varnishes.ボイル油ゆは塗と料りょうの原げん料りょうとして使つかわれる。Boiled oil is used as a raw material for paints.