Fistula

Part of speech: noun (n.)

1. A reed; a pipe.

2. A pipe for convejing water. [Obs.] Knight.

3. A permanent abnormal opening into the soft parts with a constant discharge; a deep, narrow, chronic abscess; an abnormal opening between an internal cavity and another cavity or the surface; as, a salivary fistula; an anal fistula; a recto-vaginal fistula. Incomplete fistula (Med.), a fistula open at one end only.