120-cell honeycomb
In the geometry of hyperbolic 4-space, the 120-cell honeycomb is one of five compact regular space-filling tessellations (or honeycombs). With Schläfli symbol {5,3,3,3}, it has three 120-cells around each face. Its dual is the order-5 5-cell honeycomb, {3,3,3,5}. Related honeycombs
It is related to the order-4 120-cell honeycomb, {5,3,3,4}, and order-5 120-cell honeycomb, {5,3,3,5}. It is topologically similar to the finite 5-cube, {4,3,3,3}, and 5-simplex, {3,3,3,3}. It is analogous to the 120-cell, {5,3,3}, and dodecahedron, {5,3}. See also 
 List of regular polytopes

References 
Coxeter, Regular Polytopes, 3rd. ed., Dover Publications, 1973. . (Tables I and II: Regular polytopes and honeycombs, pp. 294–296)
Coxeter, The Beauty of Geometry: Twelve Essays, Dover Publications, 1999  (Chapter 10: Regular honeycombs in hyperbolic space, Summary tables II, III, IV, V, p212-213)

Honeycombs (geometry)