- A device consisting of a spinning mass, typically a disk or wheel, mounted on a base so that its axis can turn freely in one or more directions and thereby maintain its orientation regardless of any movement of the base.陀螺仪：一个旋转物体，通常是圆盘或轮子安装在一个底基上，它的轴可以自由地朝一个或多个方向旋转，使所指方向不随底基的运动而改变