gyroscope

UK: /ˈdʒaɪrəskəʊp/ US: /ˈdʒaɪrəˌskoʊp/ ,( jī′rə skōp′)

WordReference Random House Learner's Dictionary of American English © 2025

gy•ro•scope /ˈdʒaɪrəˌskoʊp/   n. [countable]

1. Mechanics a device consisting of a rotating wheel mounted so that its axis can turn freely in certain or all directions;
   it is capable of maintaining the same absolute direction in space in spite of movements of the mountings.

See -scope-.

WordReference Random House Unabridged Dictionary of American English © 2025

gy•ro•scope  ( jī′rə skōp′), n. 

1. Mechanics an apparatus consisting of a rotating wheel so mounted that its axis can turn freely in certain or all directions, and capable of maintaining the same absolute direction in space in spite of movements of the mountings and surrounding parts: used to maintain equilibrium, determine direction, etc. Also called gyro. 

• French; see gyro-, -scope
• 1855–60;

gy•ro•scop•ic  ( jī′rə skop′ik), adj.  gy′ro•scop′i•cal•ly, adv. 

Collins Concise English Dictionary © HarperCollins Publishers::

gyroscope / ˈdʒaɪrəˌskəʊp/, gyrostat / ˈdʒaɪrəˌstæt/ noun

1. a device containing a disc rotating on an axis that can turn freely in any direction so that the disc resists the action of an applied couple and tends to maintain the same orientation in space irrespective of the movement of the surrounding structure

gyroscopic / ˌdʒaɪrəˈskɒpɪk/ adjective

ˌgyroˈscopically adverb