crystallography

 

"Fig. 102 shows a tetrahedron (o), it's edges bevelled by the trigonal tristetrahedron, +202/2, k{211} (l), and its angles replaced by the rhombic dodecahedron (d)."

From the 1890 edition of Elements of Crystallography by George Huntington Williams.  Fig. 102. appears in the chapter "The Isometric System".