/byoor"in, berr"-/ , n.
1. a tempered steel rod, with a lozenge-shaped point and a rounded handle, used for engraving furrows in metal.
2. a similar tool used by marble workers.
3. a prehistoric pointed or chisellike flint tool.
[ 1655-65; burino (now bulino ) graving tool, equiv. to bur- (perh. 1 ) + -ino -INE 2 ]