thurl

Thurl, n. Etym: [AS. a hole. *53. See Thirl, Thrill.] 1. A hole; an aperture. [Obs.] 2. (Mining) (a) A short communication between adits in a mine. (b) A long adit in a coalpit. Thurl, v. t. Etym: [See Thrill.] 1. To cut through; to pierce. [Obs.] Piers Plowman. 2. (Mining) Defn: To cut through, as a partition between one working and another.

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