Circular movements of water, air, or wind that move opposite to the main current or flow, creating a spinning whirlpool-like effect.
From Old English 'eddy,' possibly derived from Old Norse 'iða' meaning 'to work' or 'to move.' The word evolved to describe the circular water movements commonly seen behind obstacles in rivers and streams.
Eddies are nature's way of recycling—they trap sediment, nutrients, and even fish, creating miniature ecosystems where water spins in circles. You can see them in rivers behind rocks or where two currents meet, and they're essential for how rivers shape their own landscapes!
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