ridgeling
noun
ridge·ling ˈrij-liŋ 
variants or ridgling
1
: a partially castrated male animal
2
: a male animal in which one or both testes have not descended into the scrotum
Word History
Etymology
perhaps from ridge entry 1; from the supposition that the undescended testis remains near the animal's back
First Known Use
1555, in the meaning defined at sense 1
Medical Definition
ridgeling
noun
ridge·ling
variants or ridgling
ˈrij-liŋ
1
: a partially castrated male animal
2
: a male animal having one or both testes retained in the inguinal canal