(a.) Of or pertaining to space.

3-D cube-shaped cubed cubiform cuboid diced dimensional flat foursquare fourth-dimensional oblong orthogonal proportional quadrangular quadrate quadriform quadrilateral rectangular rhombic rhomboid space space-time spatial spatiotemporal spherical square stereoscopic superficial surface tetragonal tetrahedral three-dimensional trapezohedral trapezoid two-dimensional volumetric