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 .].
A primary frontal dune (PFD) is defined by the. National Flood Insurance. Program (NFIP) which as a continuous or nearly continuous mound or ridge of sand. with relatively steep seaward and landward slopes immediately landward of. and adjacent to the beach.