Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An arch or ceiling of boards placed above the workers' heads in a mine.

from the GNU version of the Collaborative International Dictionary of English

  • n. An arch, or ceiling, of boards, placed over the men's heads in a mine.

from The Century Dictionary and Cyclopedia

  • n. A ceiling of boards overhead in a mining-drift, designed to protect the men when at work from falling rocks.

Etymologies

Old English astelle piece of wood, Old French astele splinter, shaving, French attelle, astelle: compare Latin astula, diminutive of assis board. (Wiktionary)

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