+The **wheel** is a circular device designed to rotate around an [Axle](/wiki/axle), facilitating motion by greatly reducing friction. This fundamental [Invention](/wiki/invention) has been critical for [Transport](/wiki/transport) and the development of complex machines.
+## See also
+- [Gear](/wiki/gear)
+- [Vehicle](/wiki/vehicle)
+- [Simple Machine](/wiki/simple_machine)