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Webster's Dictionary (1865)

Fist'ū-lā, n.

noun

(fĭst/yū-la), n.; pl. FIST'Ū-LÆ. [Lat.; Fr. fistule, Pr., Sp., & It. fistola, Pr. & Pg. fistula.]

  1. A reed; hence, a pipe; a wind-instrument of music.
  2. (Surg.) A permanent, abnormal opening into the soft parts, with a constant discharge; a deep, narrow, chronic abscess; as, a salivary fistula, or an anal fistula.