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gyroscope

noun [C]
 
 
/ˈdʒaɪ.rə.skəʊp/ US  /-skoʊp/ (also gyro)

Definition

a device containing a wheel that spins freely within a frame, used on aircraft and ships to help keep them horizontal, and as a children's toyToys and dolls
(Definition of gyroscope noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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