pentachoron

plural pentachorons · plural pentachora

1. mathematicsA four-dimensional object analogous to a tetrahedron, constructed out of five tetrahedra.

   Geometrically, K₃ relates to a triangle, K₄ a tetrahedron, K₅ a pentachoron, etc.

   2008, Prabhakar Gupta et al., Design and Analysis of Algorithms, page 356

   2 more examples

   A triangle becomes a tetrahedron (a type of pyramid), then a pentachoron (a hyperpyramid).

   2008, George Musser, The Complete Idiot's Guide to String Theory, page 174

   The tetrahedron is a 3-simplex whose 4-simplex analog is the pentachoron, a four-dimensional body which can be orphographically ^([sic]) projected onto a quincrux (as well as a pentagram and other shapes).

   2013, Caspar Henderson, The Book of Barely Imagined Beings, page 7

   Synonyms: 5-cell