Definition from Wiktionary, the free dictionary
See also Eddy
eddy (plural eddies)
- A current of air or water running back, or in an opposite direction to the main current. Especially a circular current.
air or water running in an opposite direction to the main current
See also 
- (intransitive) To form an eddy; to move in, or as if in, an eddy; to move in a circle.
- Eddying round and round they sink.