noun
: a bit with a sharp conical or threaded center spur for guiding it, a scorer for marking the circumference of the hole, and a lip for cutting away the wood inside the circumference
noun
: a bit with a sharp conical or threaded center spur for guiding it, a scorer for marking the circumference of the hole, and a lip for cutting away the wood inside the circumference
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012