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trephine (plural trephines)
- (medicine) A surgical instrument with a cylindrical blade used to remove a circular section of tissue, f.e. bone or cornea; a trepan.
- trepan (obsolete)
surgical instrument to remove a circular section from the skull
- (intransitive) To use a trephine during surgery.
- (transitive) To perforate with a trephine.
- 1901 August 16, “Veterinary Departmental Report for May, 1901”, in The Agricultural Journal and Mining Record, volume 4, number 12, page 382:
- The pony was cast, and trephined, a middle-sized trephine (or bone saw) being used, which removed a circular piece of bone about the size of a two shilling piece, from the face immediately over the air cavity.