Answer: fistulae

AnswerCrossword Clue
fistulaenarrow passage or duct formed by disease or injury, as one leading from an abscess to a free surface, or from one cavity to another
fistulaeFISTULA, a duct formed by the imperfect closing of a wound
fistulaeopening made into a hollow organ, as the bladder or eyeball, for drainage
fistulaeany of various suppurative inflammations, as in the withers of a horse (fistulous withers), characterized by the formation of passages or sinuses through the tissues and to the surface of the skin