bevel /bev″əl/ [OFr, baif, open mouth angle] , 1. any angle, other than a right angle, between two planes or surfaces. 2. (in dentistry) any angle other than 90 degrees between a tooth cut and a cavity wall in the preparation of a tooth cavity. Compare cavosurface bevel, contra bevel. 3. the slanted portion of a needle tip that facilitates nontraumatic entry into a vein.
