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Look up trepanation or trepanning in Wiktionary, the free dictionary.
Trepanning is a form of surgery in which a hole is bored into the skull.
Trepanation or Trepanning may also refer to:
- Trepanning (manufacturing), a type of drilling designed for large holes in metal and rock workpieces
- Trepanation (album), by American Head Charge
- Trepanation, a technique used by bomb disposal units