Which definition best describes the meaning of polycystic?

Polycystic refers to the presence of multiple cysts, typically in reference to organs such as the ovaries or kidneys. In a medical context, it often describes conditions like polycystic ovary syndrome (PCOS) or polycystic kidney disease (PKD), where numerous fluid-filled sacs develop, potentially leading to various health issues. The term emphasizes the quantity of cysts rather than their size or impact.