A specialization of three dimensional thing, geometric form, and shaped thing (qq.v.). Each instance of three dimensional shape is a three-dimensional, self-connected object whose shape is (at least roughly) describable in relatively simple geometric terms. Examples include intangible 3-D objects (such as ideal cones and cylinders) as well as certain tangible objects (such as billard balls and dice). Specializations of this collection include 3d polygon, cone and torus.