fairy ring
n.— «Some sediment dweller has built its mound hard against a nodule. And on the left is a “fairy ring” of unknown origin that seems to be slipping and perhaps rolling nodules into its moat.» —“Why are there any nodules at all?” by Richard A. Kerr Science Feb. 10, 1984. (source: Double-Tongued Dictionary)
Further reading
Is there such a thing as a “neutral” accent, and if so what does it sound like? And that quirk in the way southern Californians talk about freeways. They’ll say things like take the 405 and get on the 8. Why the definite article...
Floordrobe is the new word for an old habit: piling your clothes on the floor instead of putting them away. The Oxford English Dictionary recently added an entry for it, defining floordrobe as “an untidy heap of discarded clothing left on the floor...