Macroorchidism

 
Macroorchidism: Abnormally large testes. To determine if the testes are too large, a device called an orchidometer is used that permits the testes to be compared to a series of plastic ovals (like miniature American footballs) of differing sizes. Macroorchidism is a diagnostic feature, for example, of the fragile X syndrome, the most common inherited form of mental retardation.

The opposite of macroorchidism is microorchidism (abnormally small testes).

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