Definition of "trephining" []

• Present participle of trephine. (verb)

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• "In some of his surgical operations, such as trephining for fracture of the skull, his technique has been little improved upon even in modern times."
• "The cleaning you require would first have to start with a session of trephining..."
• "Despite the current status of racism in America, I was under the impression that racial segregation was a thing of the past, like scurvy or trephining as a medical procedure."