9 letters · 17 points in Scrabble
noun rotating mechanism in the form of a universally mounted spinning wheel that offers resistance to turns in any direction
originBorrowed from French gyroscope, coined in 1852 by physicist Leon Foucault, equivalent to gyro- + -scope, from Ancient Greek γῦρος (gûros, “circle”) and σκοπός (skopós, “watcher”).
Etymology from Wiktionary, CC BY-SA 3.0