In four-dimensional Euclidean geometry, the 16-cell honeycomb is the one of three regular space-filling tessellation (or honeycomb) in Euclidean 4-space. The other two are the tesseractic honeycomb and the 24-cell honeycomb. This honeycomb is constructed from 16-cell facets, three around every edge. It has a 24-cell vertex figure.
This vertex arrangement or lattice is called the B4, D4, or F4 lattice.
Read more about 16-cell Honeycomb: Alternate Names, Coordinates, D4 Lattice, Symmetry Constructions