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English definition of “fistula”

fistula

noun [C]     /ˈfɪst.jʊ.lə/ US  /ˈfɪs.tʃə.lə/ specialized
an abnormal opening or passage from one organ to another or from an organ to the skin surface: an anal fistula Gas in the bladder may be related to a fistula between the bladder and the colon.Substances and structures in the body
(Definition of fistula noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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