blade
the component of a wind turbine rotor that is driven by the wind, thus producing a useful torque at the rotor shaft by aerodynamic forces
GRM: n.
Note: the terms vane and sail are often employed to describe specific blade positions with respect to the wind direction
References:
SEE aerogenerator
SEE wind turbine
SEE wind-power generator
SEE windmill
SEE wind dynamo
SEE Wind Energy Conversion System
SEE wind engine
SEE wind motor
SEE aeroturbine

ENERGY TERM COURTESY OF ENERGY.EU