👉 The term "unduloid" is a mathematical concept used in mathematics and physics. It refers to an object that appears to be rotating or spinning, but its actual motion cannot be directly observed. In physics, it is often used to describe objects that appear to be rotating around a fixed point, such as a planet or a satellite orbiting the Earth. The term "unduloid" was coined by physicist and mathematician William Rowan Hamilton in his work on mathematical logic. The concept of
