noun
: either of two hereditary diseases characterized by gradually enlarging bilateral cysts of the kidney which lead to reduced renal functioning:
a. : a disease that is inherited as an autosomal dominant trait, is usu, asymptomatic until middle age, and is marked by side or back pain, hematuria, urinary tract infections, and nephrolithiasis
b. : a disease that is inherited as an autosomal recessive trait, usually affects infants or children, and results in renal failure