The term 'crystal ball, for example' can be summarized as an ORB, which is a three-letter word. An ORB is a spherical object, often made of glass or crystal, that is used for divination or fortune-telling. It is believed that the person using the ORB can see visions of the future or gain insight into a situation by gazing into it. Crystal balls have been used for centuries in many cultures and are still popular today.