A four-dimensional hypercube.
Origin of tesseractGreek tessera, neuter pl. of tesseres, four; see tessera + aktīs, ray of light; see actino–.
represented in two dimensions
- (mathematics) The four-dimensional analogue of a cube; a 4D polytope bounded by eight cubes (in the same way a cube is bounded by six squares).
- (science fiction) Any of various fictional mechanisms that explain extradimensional, superluminal, or time travel outside the geometry of the physical universe.
From tessara- (“four-”) + Ancient Greek ἀκτίς (aktis, “ray”).