The term 'DARK CIRCLE' can be solved by two crossword solutions: AREOLA (6 letters) and MACADAM (7 letters). AREOLA is a small, circular area of skin around the nipple of the breast. It is usually darker than the surrounding skin and is more prominent in women than in men. MACADAM is a type of road surface consisting of layers of crushed stone bound together with tar or asphalt. It was invented by Scottish engineer John Loudon McAdam in the early 19th century and is still widely used today.