gy‧ro‧scope /ˈdʒaɪrəskəʊp $ -skoʊp/ noun [countable]
[Date: 1800-1900; Language: French; Origin: Greek gyros 'ring, circle'; because it was originally used to show how the Earth turns]
a wheel that spins inside a frame and is used for keeping ships and aircraft steady. It can also be a child’s toy.
—gyroscopic /ˌdʒaɪrəˈskɒpɪk◂ $ -ˈskɑː-/ adjective

[TahlilGaran] Dictionary of Contemporary English ▲