muoctahedron

Etymology
Short for multiple octahedron.

Noun

 * 1)  A regular skew apeirohedron with four hexagons around each vertex, formed by an infinite number of octahedron-like cells (specifically, truncated octahedra missing their square faces, and joined by the resulting square-shaped holes) in Euclidean 3D space.

Translations

 * Japanese: 六角四片四角孔ねじれ正多面体