[bur] 
noun, verb, burred, bur⋅ring.| 1. | a rough, prickly case around the seeds of certain plants, as the chestnut or burdock. |
| 2. | any bur-bearing plant. |
| 3. | something that adheres like a bur. |
| 4. | Machinery. burr 1 (defs. 1, 3). |
| 5. | 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. |
| 6. | Surgery. a cutting tool resembling that of a dentist, used for the excavation of bone. |
| 7. | to extract or remove burs from. |
[bur] | 1. | Also, buhr. a protruding, ragged edge raised on the surface of metal during drilling, shearing, punching, or engraving. |
| 2. | a rough or irregular protuberance on any object, as on a tree. |
| 3. | a small, hand-held, power-driven milling cutter, used by machinists and die makers for deepening, widening, or undercutting small recesses. |
| 4. | a lump of brick fused or warped in firing. |
| bur 1 also burr (bûr) n.
[Middle English burre, of Scandinavian origin.] |
| bur 2 (bûr) n. & v. Variant of burr2. |
| bur 3 (bûr) n. Variant of burr3. |
| burr 2 also bur (bûr) n.
v. tr. To pronounce with a burr. v. intr.
[Imitative.] |
| burr 3 also bur (bûr) n. A washer that fits around the smaller end of a rivet. [Middle English burre, ring, disk, alteration of burwhe, circle, disk.] |
bur or burr (bûr)
n.
A rotary cutting instrument used in dentistry for excavating decay, shaping cavity forms, and reducing tooth structure.
A drilling tool for enlarging a trephine hole in the cranium.
burr (bûr)
n.
Variant of bur.
| bur also burr (bûr) Pronunciation Key
A type of pseudocarp in which the outer surface possesses hooks or barbs. Burs become caught in the feathers or hair of animals, which then carry them away to disperse the seeds. |
BUR
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