Thürl, n.

noun

n. [A-S. thyrhel, thyrel, thyrl, a hole, thyrhel, thyrel, bored or pierced through, O. H. Ger. durhil. See THIRL, THRILL, DRILL, and THROUGH.] (Mining.) (a.) A short communication between adits in mines. Brande. (b.) A long adit in a coal-pit. Weale.