burr
noun
1. seed vessel having hooks or prickles
Similar word(s): bur
Definition categories: plant, pericarp
2. rough projection left on a workpiece after drilling or cutting
Definition categories: man–made, projection
3. rotary file for smoothing rough edges left on a workpiece
Definition categories: man–made
4. small bit used in dentistry or surgery
Similar word(s): bur
Definition categories: man–made, bit