- 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>.