boiled oil

boiled oil

[¦bȯild ′ȯil]
(materials)
A drying oil in which metallic driers are added during the cooking; the reaction releases water, resulting in a boiling of the batch.

boiled oil, pale-bodied oil

Any oil, but esp. linseed oil, which has been partially polymerized by heating at about 500°F (260°C) together with driers to promote rapid drying.
References in periodicals archive ?
They also placed on the doors of the castle containers of boiled oil, in case enemies approached the door, they would pour the oil on them, and then launch burning arrows as the oil helped spread fire over the rest of the attacking army.
They boiled oil and made the men immerse their hands.
Graham, Hall Green A: GOOD chips are cooked in very hot high quality boiled oil or fat, drained when tender and very lightly browned then fried very briefly a second time.