In the geometry of hyperbolic 5-space, the 16-cell honeycomb honeycomb is one of five paracompact regular space-filling tessellations (or honeycombs).
It is called paracompact because it has infinite vertex figures, with all vertices as ideal points at infinity.
With Schläfli symbol {3,3,4,3,3}, it has three 16-cell honeycombs around each cell.
It is self-dual.
It is related to the regular Euclidean 4-space 16-cell honeycomb, {3,3,4,3}.