# Cell (mathematics)

A

**cell** is a three-dimensional object that is part of a higher-dimensional
object, such as a

polychoron. A cell is related to higher-dimensional objects in
the way that a face, or two-dimensional

polygon, is related to higher-dimensional
objects. For example, a cell is to a 4-dimensional polytope, or polychoron, what a
face is to a 3-dimensional

polytope, or

polyhedron.