gyroelongated
Adjective
Meaning
gyroelongated (not comparable)
(of a polyhedron) Having been elongated by placing an antiprism in the middle of the polyhedron.
Examples
A regular icosahedron is a gyroelongated pentagonal bipyramid and a biaugmented pentagonal antiprism in any of six orientations.
It can be decomposed into a gyroelongated pentagonal pyramid and a pentagonal pyramid or into a pentagonal antiprism and two equal pentagonal pyramids.
The gyroelongated triangular prismatic tiling has the same vertex figure as one of the plain prismatic tilings; the two may be derived from the gyrated and plain triangular prismatic tilings, respectively, by inserting layers of cubes.
The elongated and gyroelongated alternated cubic tilings have the same vertex figure, but are not alike.