the world > space > shape > unevenness > projection or prominence > sharp unevenness > [noun] > a sharp prominence > uneven or accidental (5)
A sharp, angular, or jagged projection.
transferred. A projecting part or point resembling an animal's tooth; esp. one of a row or series of… An accidental jag or uneven projection at…
A sharp or jagged projection, esp. a small irregularity on the edge of a piece of cast metal or cut wood. Now chiefly as mass noun: such…
In metalwork: a small piece of metal left protruding by an incorrectly-positioned drilling or cutting tool.