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

{ n. Also }. [ Benzoin + naphthol. ] (Chem.) A white crystalline powder used as an intestinal antiseptic; beta-naphthol benzoate. [ Webster 1913 Suppl. ]

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 ]

n. (Chem.) The act of treating with ozone; also, the act of converting into, or producing, ozone; ozonization. [ 1913 Webster ]

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 ]

‖n.; pl. Zonae [ L., a girdle. See Zone. ] A zone or band; a layer. [ 1913 Webster ]

Zona pellucida. [ NL. ] (Biol.) (a) The outer transparent layer, or envelope, of the ovum. It is a more or less elastic membrane with radiating striae, and corresponds to the cell wall of an ordinary cell. See Ovum, and Illust. of Microscope. (b) The zona radiata. --
Zona radiata [ NL. ] (Biol.), a radiately striated membrane situated next the yolk of an ovum, or separated from it by a very delicate membrane only. [ 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 ]

n. [ Mod. Gr. &unr_; a girdle, fr. Gr. &unr_;, dim. of &unr_; a girdle. See Zone. ] A belt or girdle which the Christians and Jews of the Levant were obliged to wear to distinguish them from Mohammedans. [ Written also zonnar. ] [ 1913 Webster ]

‖n. pl. [ NL. ] (Zool.) A division of Mammalia in which the placenta is zonelike. [ 1913 Webster ]