noun ·Rare ·Advanced level

Definitions

Noun

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

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

Synonyms

All synonyms

5 cell5-cell

Example

More examples

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

Etymology

From penta- (“five”) + -choron (“4-dimensional solid”), from Ancient Greek πέντε (pénte, “five”) and χῶρος (khôros, “room”).

Related phrases

four dimensional

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.