a rough, prickly case around the seeds of certain plants, as the chestnut or burdock.

any bur-bearing plant.

something that adheres like a bur.

Machinery . burr 1 ( defs. 1, 3 ) .

Dentistry . a rotary cutting tool usually of steel or other hard metal shaped into a shank and a head, for removing carious material from teeth and preparing cavities for filling.

Surgery . a cutting tool resembling that of a dentist, used for the excavation of bone.

to extract or remove burs from.

noun

burr