Definition of gyroscope noun from the Oxford Advanced American Dictionary

 

gyroscope

 noun
noun
NAmE//ˈdʒaɪrəˌskoʊp//
 
(informal gyro
NAmE//ˈdʒaɪroʊ//
 
)
 
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a device consisting of a wheel that spins rapidly inside a frame and does not change position when the frame is moved. Gyroscopes are often used to keep ships and aircraft steady.
NAmE//ˌdʒaɪrəˈskɑpɪk//
 
adjective
See the Oxford Advanced Learner's Dictionary entry: gyroscope