In eight-dimensional Euclidean geometry, the cyclotruncated 8-simplex honeycomb is a space-filling tessellation (or honeycomb).
The tessellation fills space by 8-simplex, truncated 8-simplex, bitruncated 8-simplex, tritruncated 8-simplex, and quadritruncated 8-simplex facets.
These facet types occur in proportions of 2:2:2:2:1 respectively in the whole honeycomb.
It can be constructed by nine sets of parallel hyperplanes that divide space.
Regular and uniform honeycombs in 8-space: