16-cell honeycomb
In four-dimensional Euclidean geometry , the 16-cell honeycomb is one of the three regular space-filling tessellations ( or honeycombs ) , represented by Schläfli symbol {3 , 3 , 4 , 3} , and constructed by a 4-dimensional packing of 16-cell facets , three around every face . 
<triplet> 16-cell honeycomb <subj> honeycombs <obj> subclass of <triplet> honeycombs <subj> tessellations <obj> subclass of