trepan
2tre·pan
noun \ˈtrē-ˌpan, tri-ˈpan\Definition of TREPAN
: a heavy tool used in boring mine shafts
Origin of TREPAN
Middle English trepane trephine, Anglo-French trepan, from Medieval Latin trepanum, from Greek trypanon auger, from trypan to bore
First Known Use: circa 1877
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