tesseract

English

A three-dimensional projection of a tesseract.

A two-dimensional projection of a tesseract.

From tessara- (“four-”) +‎ Ancient Greek ἀκτίς (aktís, “ray”).

tesseract (plural tesseracts)

(mathematics, geometry) The four-dimensional analogue of a cube; a 4D polytope bounded by eight cubes (analogously to the way a cube is bounded by six squares).
- 1906, Charles Howard Hinton, The Fourth Dimension, S. Sonnenschein & Company, page 239:
  Hence the cube determined by these axes is the face of the tesseract which we now have before us.
- 1910, Henry Parker Manning, The Fourth Dimension Simply Explained, Munn, Incorporated, page 93:
  […] then it would trace out a higher cube, or tesseract, and each of the six surrounding cubes, carried on in the same motion, would trace tesseracts also, […] .
(science fiction) Any of various fictional mechanisms that explain extradimensional, superluminal, or time travel outside the geometry of the physical universe.
- 1962, Madeleine L'Engle, A Wrinkle in Time, published 2019, unnumbered page:
  "I shall just sit down for a moment and pop on my boots and then I'll be on my way. Speaking of ways, pet, by the way, there is such a thing as a tesseract."

four-dimensional analogue of a cube

Chinese:
Mandarin: 四維超正方體／四维超正方体 (sìwéichāozhèngfāngtǐ), 正八胞體／正八胞体 (zhèngbābāotǐ)
Czech: teserakt (cs) m
Finnish: tesserakti (fi)
French: tesseract (fr)
German: Tesserakt (de) m
Icelandic: ferverpill (is) m, fjórvíður teningur m
Japanese: 正八胞体 (せいはちほうたい, seihachihōtai)
Macedonian: тесеракт m (teserakt)
Polish: teserakt m
Russian: тессеракт (ru) m (tesserakt)
Spanish: teseracto m
Swedish: tesserakt c