Technical term for a rotating component with vanes used in pumps, turbines, and similar machinery.
The pump's impeller rotates and draws up water.
タービンの羽根車は高温高圧の蒸気で回る。
The turbine runner is turned by high-temperature, high-pressure steam.
Compound of 羽根 (hane, 'blade, vane') and 車 (kuruma, 'wheel').