fistula

noun3

1. •
   An abnormal connection or passageway between organs or vessels that normally do not connect.

   • Small fistulae are to be closed bilaterally in an antero-posterior line[…] — 1903
2. •
   (rare) A tube, a pipe, or a hole.
3. •
   (historical) The tube through which the wine of the Eucharist was once sucked from the chalice in certain ceremonies (such as papal Masses).