Fistula

·noun A reed; a pipe.

II. Fistula ·noun A pipe for convejing water.

III. Fistula ·noun 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.