- A circular or oval ring with an internal cutting edge used to shave off tumors in the nasal and other cavities.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for ring-knife
With a ring-knife any irregular spicules or projections can be smoothed down.
Removal through the nasal chambers—the route originally used by Meyer for his ring-knife—is not to be recommended.