adj. not divided into zones; -- opposite of zonal. azonal heating [ WordNet 1.5 ]

adj. relating to or concerned with the combined affairs of two administrative zones. Bizonal currency was used in occupied Germany after World War II [ WordNet 1.5 ]

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. (Anat.) Situated under a zone, or zona; -- applied to a membrane between the zona radiata and the umbilical vesicle in the mammal embryo. [ 1913 Webster ]

a. [ Gr. &unr_;; &unr_;, for &unr_; &unr_; the same + E. zonal. ] (Crystallog.) Belonging to the same zone; as, tautozonal planes. [ 1913 Webster ]

a. [ L. zonalis. ] Of or pertaining to a zone; having the form of a zone or zones. [ 1913 Webster ]

Zonal equation (Crystallog.), the mathematical relation which belongs to all the planes of a zone, and expresses their common position with reference to the axes. --
Zonal structure (Crystallog.), a structure characterized by the arrangements of color, inclusions, etc., of a crystal in parallel or concentric layers, which usually follow the outline of the crystal, and mark the changes that have taken place during its growth. --
Zonal symmetry. (Biol.) See the Note under Symmetry. [ 1913 Webster ]