burr 3 also bur 
(bûr)
(bûr)n.
A washer that fits around the smaller end of a rivet.
[Middle English burre, ring, disk, alteration of burwhe, circle, disk.]
- convection zone
- convective
- convectively
- convector
- convenable
- convene
- convener
- convenience
- convenience food
- convenience store
- conveniency
- convenient
- conveniently
- convenor
- convent
- conventicle
- conventicler
- convention
- conventional
- conventionalism
- conventionalist
- conventionality
- conventionalization
- conventionalize
- conventionally