Examples from the Web for polyhedral
Shell subspherical or polyhedral, with fourteen triangular, convex faces, covered with irregular polygonal plates.
Shell quite irregular roundish or polyhedral, with roundish pores of different size.
Directly superposed to these we find cells which in shape are polyhedral.Diseases of the Horse's Foot|Harry Caulton Reeks
Their form may be either spherical, irregularly rounded, or polyhedral.
Suppose the polyhedral angle were concave, why would the proof not hold?The Teaching of Geometry|David Eugene Smith