Polycystic Ovarian Disease: This disease, also commonly known as PCOS, refers to cysts that form from a buildup of follicles. They cause the ovaries to enlarge and create a thick outer covering, which may prevent ovulation from occurring. They are often the cause of fertility problems.
dune. n. A hill or ridge of wind-blown sand. [French, from Old French, from Middle Dutch. ; see dheuÉ- in Indo-European roots .].
SAND DUNES. Sand dunes are a natural wonder with beauty and majesty all their own. However, when you know more about the dunes, they take on even greater significance. Once you learn about the complex, dynamic dune ecosystem, you will appreciate dunes even more. Before we describe sand dunes, we need to know what sand is.