+A **vane** is a flat or curved surface, often part of a larger structure, designed to interact with a fluid like [Air](/wiki/air) or [Water](/wiki/water). It may rotate to harness energy, as in a [Windmill](/wiki/windmill), or remain fixed to provide guidance or stability.
+## See also
+- [Propeller](/wiki/propeller)
+- [Rotor](/wiki/rotor)
+- [Wind](/wiki/wind)
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