burr-drilln. a dentist's drill with a serrated or file-cut knob or head.
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burr1859
burr-drill1859
drill1859
foot drill1860
tooth-mill1879
1850 C. A. HarrisPrinc. & Pract. Dental Surg. (ed. 4) iii. iii. 290 The flat and burr-headed drills are very useful for enlarging the opening into the cavity.]
1859 J. TaftPract. Treat. Operative Dentistry iv. 96Bur Drills..should be manufactured of the best steel, and wrought with the greatest care.