noun - Four-dimensional hypercube; its vertices are (+/-1, +/-1, +/-1, +/-1). It is a polychoron formed from eight equal cube cells that are perpendicular to each other at their faces. It is the tetraspace analog to the square in planespace and the cube in realmspace. In some literature, the term tesseract refers to the inner projection of a tetracube into realmspace, which looks like a cube within a cube.

a four dimensional cube, and also a common name for the Darkness Beyond Time in Chrono Cross

a four dimensional cube, and the movie initially claimed to have a multi-dimensional theme

a four- dimensional hypercube

a four-dimensional object

a fourth dimensional geometric shape, which is represented in three dimensional space and time as a 'hypercube'

a name sometimes used for the extension of a cube to four-dimensions

an example of afour-dimensional object

a three-dimensional object

In geometry, the tesseract, also called 8-cell or octachoron, is the four-dimensional analog of the (three-dimensional) cube, where motion along the fourth dimension is often a representation for bounded transformations of the cube through time. The tesseract is to the cube as the cube is to the square; or, more formally, the tesseract can be described as a regular convex 4-polytope whose boundary consists of eight cubical cells.