#bur__burr  small bit used in dentistry or surgery
  supertype:  #bit.cutting_implement  the cutting part of a drill; usually pointed and threaded and is replaceable in a brace or bitstock or drill press; "he looked around for the right size bit"
  part of:  #dentist's_drill__dentist'sdrill__burr_drill  a high speed drill that dentists use to cut into teeth

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