main rotor
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Noun | 1. | ![]() rotor - rotating mechanism consisting of an assembly of rotating airfoils; "there are horizontal rotors on a helicopter or compressor rotors in a jet engine" rotary wing, rotor blade - the long airfoil that rotates to provide the lift that supports a helicopter in the air rotor head, rotor shaft - the axis around which the major rotor of a helicopter turns |
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