I'ri-dĕc'to-my, n.

n. [Gr. ἶρις, ἴριδος, iris, and ἐκτομή, cutting out, from ἐκ, out, and τομή, cut, wound, from τέμνειν, to cut.] (Surg.) The act or process of cutting out a portion of the iris in order to form an artificial pupil.