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urethrostomy

n. (context surgery English) A procedure that creates a permanent opening in the urethra, typically to remove obstructions to the flow of urine.

Wikipedia
Urethrostomy

Urethrostomy is a surgical procedure that creates a permanent opening in the urethra, commonly to remove obstructions to urine flow. The procedure is most often performed in male cats, where the opening is made in the perineum.