The term 'donut shape' can be described as a torus, which is a five-letter word. A torus is a three-dimensional shape that is formed by rotating a circle around an axis that is outside of the circle. It is similar to a doughnut in that it has a hole in the middle, but it is not flat like a doughnut. The surface of a torus is curved and has a continuous loop. Tori are often used in mathematics, engineering, and architecture.