8-cell

English

A Schlegel diagram of an 8-cell

Etymology

8 +‎ cell

Pronunciation

• IPA^(key): /ˈeɪtˌsɛl/

Noun

8-cell (plural 8-cells)

1. (geometry) A four-dimensional polytope, analogous to a cube, whose eight bounding facets are cubes; a tesseract.
   • 1988, Klaus Mainzer, Symmetries of Nature: A Handbook for Philosophy of Nature and Science, published 1996, page 159:

     According to this table the tetrahedron corresponds to the 5-cell, the cube to the 8-cell ("hypercube"), the octahedron to the 16-cell, the dodecahedron to the 120-cell and the icosahedron to the 600-cell. The 24-cell is an additional body in four-dimensional space which is dual to itself.

   • 1996, John Milnor, “Growing Up in the Old Fine Hall”, in Hugo Rossi, editor, Prospects in Mathematics: Invited Talks on the Occasion of the 250th Anniversary of Princeton University, page 6:

     Similarly in dimension eight there is the quaternionic projective plane which we can think of as a 4-sphere with an 8-cell attached, and in dimension sixteen there is a Cayley projective plane which has similar properties.

   • 1997, J. François Gabriel, editor, Beyond the Cube: The Architecture of Space Frames and Polyhedra‎^[1], page 412:

     Of these nine, five are finite structures in Euclidean space and include the simplex, {3,3,3} (or 5-cell), the four-dimensional cube {4,3,3} (or 8-cell) and its dual {3,3,4} (or 16-cell), and the 120-cell {5,3,3} and its dual {3,3,5} (or 600-cell).

Synonyms

• (4-dimensional polytope analogous to a cube): 4-cube, hypercube (or 4-dimensional hypercube), cubic prism, octachoron, octahedroid, tesseract

Hypernyms

• (polytope analogous to a cube): hypercube

Translations

four-dimensional polytope

• Esperanto: okĉelo
• Italian: ipertetraedro m, tesseratto m, ipercubo quadridimensionale m
• Japanese: 正八胞体 (せいはちほうたい, seihachihōtai)