undescended testicle

Definition of undescended testicles
National Cancer Institute

undescended testicles

(UN-deh-SEN-ded TES-tih-kuls)
A condition in which one or both testicles fail to move from the abdomen, where they develop before birth, into the scrotum. Undescended testicles may increase the risk for development of testicular cancer. Also called cryptorchidism.

Source: NCI Dictionary of Cancer Terms