rhombicuboctahedron

noun2

1. •
   An Archimedean solid with eight triangular and eighteen square faces; the small rhombicuboctahedron.

   • Therefore eight triangles and eighteen (that is, twelve and six) squares join up to make an icosihexahedron, which I call a truncated cuboctahedral rhombus or a rhombicuboctahedron. — 1997
2. •
   [in compounds] Either of the small rhombicuboctahedron and great rhombicuboctahedron.