
1) Ancient Roman technology 2) French word used in English 3) Greek invention 4) Gyroscope ring
Found on
https://www.crosswordclues.com/clue/gimbal

A gimbal is a pivoted support that allows the rotation of an object about a single axis. A set of three gimbals, one mounted on the other with orthogonal pivot axes, may be used to allow an object mounted on the innermost gimbal to remain independent of the rotation of its support (e.g. vertical in the first animation). For example, on a ship, the...
Found on
http://en.wikipedia.org/wiki/Gimbal

• (n.) Alt. of Gimbals
Found on
http://thinkexist.com/dictionary/meaning/gimbal/

Used in attitude controlled vehicles to support motor so it can be deflected to produce control vectored thrust. Also the support of a gyroscope in a stable platform or in a rate gyro.
Found on
http://www.aeroconsystems.com/glossary.htm

A mechanical frame for a gyroscope or power unit, usually with two perpendicular axes of rotation.
Found on
http://www.braeunig.us/space/glossary.htm

(from the article `navigation`) ...from the card. So familiar has this combination become that it is called the compass, although that word originally signified the division of the ... ...to minimize friction; and to damp out oscillations from the ship`s motion. The bowl is closed on the top and bottom by glass, the bottom glass ... ...
Found on
http://www.britannica.com/eb/a-z/g/32

• A device with two mutually perpendicular and intersecting axes of rotation on which an engine or other object may be mounted. • In a gyro, a support which provides the spin axis with a degree of freedom. • The rotation of a rocket`s motor nozzle to control the direction of thr...
Found on
http://www.daviddarling.info/encyclopedia/G/gimbal.html

Gimbals (Cardan Suspension) are devices used chiefly on board ship for suspending objects so that they remain vertical in spite of any inclination of the support to which they are attached. Typically, a gimbals consist of two brass rings or hoops, moving each perpendicularly to its plane aout two axes which are at right angles to each other.
Found on
http://www.probertencyclopaedia.com/browse/RG.HTM

A device, usually consisting of a pair rings mounted on pivots or axes at right angles to each other so that an object will remain suspended in a horizontal plane between them regardless of any motion of its support. Commonly used for sea-faring instruments so as to counteract the motion of the vessel.
Found on
https://www.encyclo.co.uk/local/20820
noun an appliance that allows an object (such as a ship`s compass) to remain horizontal even as its support tips
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.