a relatively thin sheet-like expanse or region lying over or under another
location noun
layers
region » location » object » physical entity
asthenosphere | cell wall | chromosphere | crust | exosphere | hydrosphere | lithosphere | lower mantle | mantle | mesosphere | ozone layer | snow | stratosphere | stratum | surface | thermosphere | tropopause | troposphere | upper mantle
Page last updated: 2009-12-07