Definitions of trepan
  1. noun
    a drill for cutting circular holes around a center
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    type of:
    a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows)
  2. noun
    a surgical instrument used to remove sections of bone from the skull
    synonyms: trephine
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    type of:
    surgical instrument
    a medical instrument used in surgery
  3. verb
    cut a hole with a trepan, as in surgery
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    type of:
    bore, drill
    make a hole, especially with a pointed power or hand tool
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