An ellipsoidal shape is a three-dimensional figure that is similar to an OVAL, OBLONG, or OVATE shape. It is defined by its three mutually perpendicular axes of symmetry, which intersect at the center of the figure. Ellipsoids are often used in mathematics and physics to describe the shape of objects such as planets, stars, and galaxies. The term 'OVAL' refers to a two-dimensional figure with two axes of symmetry, while 'OBLONG' and 'OVATE' refer to three-dimensional figures with three axes of symmetry. All three terms can be used to describe an ellipsoidal shape.