Trepanning, also known as trephination, trephining or making a burr hole (the verb trepan derives via Old French and therefrom via Medieval Latin from the Greek noun of relevant meaning trypanon, literally `(a) borer, (an) auger`) is a surgical intervention in which a hole is drilled or scraped into the human skull, exposing the dura mater to tr.....
• (p. pr. & vb. n.) of Trepan
(from the article `medicine, history of`) One curious method of providing the disease with means of escape from the body was by making a hole, 2.5 to five centimetres across, in the skull of ...
A type of boring where an annular cut is made into a solid material with the coincidental formation of a plug or solid cylinder.
A type of boring where an annular cut is made into a solid material with the coincidental formation of a plug or solid cylinder.