(Saxon,) of ed, "backward," and ea, "water," among seamen, is where the water runs back contrary to the tide; or that which hinders the free passage of the stream, and so causes it to return again. That eddy water, which falls back, as it were, on the rudder of a ship under sail, the seamen call the dead water.

Eddy Wind is that which returns or is beat back from a sail, mountain, or any thing that may hinder its passage.