Final answer:
Orchiopexy is a surgical fixation of the testis in the scrotal sac. It is used to correct undescended testes in infants or children.
Step-by-step explanation:
A surgical fixation of the testis in the scrotal sac is known as orchiopexy. Orchiopexy is a medical procedure that involves surgically attaching the testis to the scrotum, typically to correct undescended testes in infants or children. During the procedure, the testis is brought down into the scrotal sac and fixed in place to ensure proper positioning.