Look up tesseract, 8-cell, or octachoron in Wiktionary, the free dictionary.
A tesseract is a four-dimensional analog of the cube.
Tesseract may also refer to:
Arts and entertainmentedit
Literatureedit
Tesseract, a concept for spacetime travel in the novel A Wrinkle in Time, by Madeleine L'Engle (1962), and subsequent novel, An Acceptable Time (1989).