Pronunciation: (byoor'in, bûr'-), [key]
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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.