#plane_section__planesection__section  (geometry) the area created by a plane cutting through a solid
  supertype:  #area.region__country  a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography); "it was a mountainous area"; "Bible country"
  subtype:  #cross_section__crosssection  a section created by a plane cutting a solid perpendicular to its longest axis
     subtype:  #profile.cross_section  a vertical section of the Earth's crust showing the different horizons or layers
        subtype:  #soil_profile  a vertical section of soil from the ground surface to the parent rock

No statement uses or specializes #plane_section; click here to add one.