a. [ Poly- + zonal. ] Consisting of many zones or rings. [ 1913 Webster ]
Polyzonal lens (Opt.), a lens made up of pieces arranged zones or rings, -- used in the lanterns of lighthouses. [ 1913 Webster ]
a. Having many angles. [ 1913 Webster ]
Polygonal numbers, certain figurate numbers. See under Figurate. [ 1913 Webster ]