Noun
the long airfoil that rotates to provide the lift that supports a helicopter in the air
Source: WordNetOur nano-quadrotor robots are made to be as lightweight as possible: less than a fifth of a pound and palm-sized. They can do an aerial backflip in half a second, accelerate at two Gs, and fly rotor blade to rotor blade in three-dimensional formations - and they do all this autonomously. Vijay Kumar