trepanning

Variant of trepan

trepan definition

tre·pan (trē pan′, tri-)

noun

  1. an early form of the trephine
  2. a heavy boring tool for sinking shafts, quarrying, etc.

Etymology: ME trepane < ML trepanum < Gr trypanon, carpenters' tool, auger, trepan < trypan, to bore < IE *treup- < base *ter-, to bore, rub > throw

transitive verb trepanned -·panned′, trepanning -·pan′·ning

  1. trephine
  2. to cut a disk out of (a metal plate, ingot, etc.)

Related Forms:

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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