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aileron

noun [C]
 
 
/ˈeɪ.lə.rɒn/ US  /-rɑːn/ specialized

Definition

a part along the back edge of an aircraft's wing that can be moved to help the aircraft turn or to keep it levelParts of aeroplanes
(Definition of aileron noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of aileron