sack borer

noun

Definition of sack borer 

: a device used in mining for sinking shafts in soft ground by boring to the full size with a very large tool resembling an auger behind the cutters of which large sacks are attached to catch material as it is removed

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Dictionary Entries near sack borer

sack

sackage

sack-bearer

sack borer

sackbut

sackcloth

sack cloud

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