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A Polyhedron or plane Tessellation is called semiregular if its faces are all Regular Polygons and its corners are alike (Walsh 1972; Coxeter 1973, pp. 4 and 58; Holden 1991, p. 41). The usual name for a semiregular polyhedron is an Archimedean Solid, of which there are exactly 13.
See also Archimedean Solid, Polyhedron, Tessellation
References
Coxeter, H. S. M.  ``Regular and Semi-Regular Polytopes I.''  Math. Z. 46, 380-407, 1940.
 
Coxeter, H. S. M.  Regular Polytopes, 3rd ed.  New York: Dover, 1973.
 
Holden, A.  Shapes, Space, and Symmetry.  New York: Dover, 1991.
 
Walsh, T. R. S.  ``Characterizing the Vertex Neighbourhoods of Semi-Regular Polyhedra.''
  Geometriae Dedicata 1, 117-123, 1972.