cryptorchidism

 
Pronunciation: /ˈkrɪpˌtɔːkɪdɪzm/

noun

[mass noun] Medicine
  • a condition in which one or both of the testes fail to descend from the abdomen into the scrotum.

Origin:

late 19th century: from crypto- 'hidden' + Greek orkhis, orkhid- 'testicle' + -ism