Tesseract

Origin

From tessara- ("four-") + Ancient Greek ἀκτίς ("ray").

Full definition of tesseract

Noun

1. (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).
2. (science fiction) Any of various fictional mechanisms that explain extradimensional, superluminal, or time travel outside the geometry of the physical universe.

Synonyms

• (analogue of a cube) four-dimensional hypercube, 8-cell, octachoron, tetracube

Hypernyms

• hypercube, polytope