1. The problem asks to identify a solid with surfaces that are fully or partially curved. 2. In geometry, solids can have flat surfaces (like cubes) or curved surfaces (like spheres). 3. A solid with curved surfaces is called a "curved solid" or more commonly a "solid of revolution" or simply a "curved solid". 4. Examples include spheres, cylinders, cones, and ellipsoids. 5. Therefore, the answer is: A **curved solid** is a solid that has surfaces that are fully or partially curved.