Anorchous is an adjective which describes a sexual disorder characterized by a lack of testes. Men who are anorchous typically have scrotums, but no testicles.
The term anorchous originally comes from the Greek word anorchos, from the prefix “an-“ meaning without and “orchis,” meaning testicle.
Anorchous is a historical term with its first known use dating back to around 1881.