Me·at'o·tome noun [ Meatus + Greek ... to cut.] (Surg.) An instrument for cutting into the urethra so as to enlarge its orifice. 
<surgery> An instrument for cutting into the urethra so as to enlarge its orifice. ... Origin: Meatus + Gr. To cut. ... Source: Websters Dictionary ... (01 Mar 1998) ... 
• (n.) 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.