Dictionary entry

Trepan (2)

Webster's Dictionary 1913

Tre‐pan″, v. t. & i. [imp. & p. p.Trepanned (?); p. pr. & vb. n.Trepanning.] [Cf. F. trépaner. See Trepan a saw.] (Surg.) To perforate (the skull) with a trepan, so as to remove a portion of the bone, and thus relieve the brain from pressure or irritation; to perform an operation with the trepan.