16-cells

Noun

16-cell (plural 16-cells)

1. A four-dimensional polytope, analogous to an octahedron, whose sixteen bounding facets are tetrahedra.
   • The remaining 8, as before, are the vertices of the complementary 16-cell (see Figure 9). In Figure 7, these 8 points have been blackened, but not joined, because the 16-cell has longer edges; diameters of octahedral facets of the 24-cell.1995, Harold Scott Macdonald Coxeter, “Paper Three: Two Aspects Of The Regular 24-Cell In Four Dimensions”, in F. Arthur Sherk, editor, Kaleidoscopes: Selected Writings of H.S.M. Coxeter, page 32

   Synonyms:

   4-orthoplex, 4-demicube, 4-hemicube, demihypercube, demitesseract, hexadecachoron, hexadecahedroid