trephination

noun treph·i·na·tion \ ˌtre-fə-ˈnā-shən \

Definition of trephination

: an act or instance of perforating the skull with a surgical instrument

First Known Use of trephination

1874

in the meaning defined above

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Medical Dictionary

trephination

noun treph·i·na·tion \ ˌtref-ə-ˈnā-shən \

medical Definition of trephination

: an act or instance of using a trephine (as to perforate the skull)

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