Sentence:  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 <WSD>rhombicuboctahedron</WSD>. 
Meaning of the word marked with <WSD> tags:  An Archimedean solid with eight triangular and eighteen square faces; the small rhombicuboctahedron.