From the Merriam-Webster Online Dictionary:
* Main Entry: 1ed·dy
* Pronunciation: \ˈe-dē\
* Function: noun
* Inflected Form(s): plural eddies
* Etymology: Middle English (Scots) ydy, probably from Old Norse itha
* Date: 15th century
1 a : a current of water or air running contrary to the main current; especially : a circular current : whirlpool b : something moving similarly
2 : a contrary or circular current (as of thought or policy)