Zipf, G.K.
Author of the rank-size rule.
Zeugen
A table-shaped area of rock found in arid and semi-arid areas formed when more resistant rock is reduced at a slower rate than softer rocks around it under the effects of wind erosion.
Zonal soil
Soils that have been under development for a very long period of time and therefore show characteristics clearly attributable to the biome in which they are found.
Zooplankton
Animal species of plankton.