Plural of gyre; circular or spiral movements, or in oceanography, large rotating ocean current systems.
From Greek 'gyros' meaning circle. The word refers to both poetic/general circular forms and specific oceanographic phenomena like the North Atlantic Gyre.
Ocean gyres are massive whirlpools that spin around for thousands of years—the North Atlantic Gyre is so huge it could fit several European countries inside it, and it's creating an island of plastic garbage.
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