• Arrangement or formation in zones; zonate structure.
  • The distribution of organisms in biogeographic zones.
  • In <em>phytogeography</em>, the distribution of vegetation in œcological zones or belts, or the general concept of such distribution. See <internalXref urlencoded="zone">zone</internalXref>, 8.
  • In <em>cytology</em>, a term applied to a differentiation of the cytoplasm of the plant cell into concentric layers.
  • An arrangement or distribution of things into <xref>zones</xref>.
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