• (n.) An instrument for cutting into the urethra so as to enlarge its orifice.
Me·at'o·tome noun [ Meatus + Greek ... to cut.] (Surg.) An instrument for cutting into the urethra so as to enlarge its orifice. 
Type: Term Pronunciation: mē-at′ō-tōm Definitions: 1. A knife with short cutting edge for use in meatotomy.