Definition of gyroscope noun from the Oxford Advanced Learner's Dictionary

 

gyroscope

 noun
noun
BrE BrE//ˈdʒaɪrəskəʊp//
 
; NAmE NAmE//ˈdʒaɪrəskoʊp//
 
(informal gyro
BrE BrE//ˈdʒaɪrəʊ//
 
; NAmE NAmE//ˈdʒaɪroʊ//
 
)
Parts of a plane, Parts of boats and ships
 
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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. See related entries: Parts of a plane, Parts of boats and ships Word Origin mid 19th cent.: from French, from Greek guros ‘a ring’ + modern Latin scopium, from Greek skopein ‘look at’.
See the Oxford Advanced American Dictionary entry: gyroscope