TREPHINE

[ trɪ'fʌɪn , -'fi:n ]

■ noun a hole saw used in surgery to remove a circle of tissue or bone.

■ verb operate on with a ~.

Derivatives

trephination ˌtrɛfɪ'neɪʃ(ə)n noun

Origin

C17: from L. tres fines 'three ends', appar. influenced by trepan .