noun
: a boring machine or mill in which the cutting tools are carried directly by the spindle without the interposition of a boring bar and the spindle is supported along its entire length by a projecting boss
noun
: a boring machine or mill in which the cutting tools are carried directly by the spindle without the interposition of a boring bar and the spindle is supported along its entire length by a projecting boss
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012