spatial region
two-dimensional spatial region
TwoDimensionalSpatialRegion
2d-s-region
(forall (x) (if (TwoDimensionalSpatialRegion x) (SpatialRegion x))) // axiom label in BFO2 CLIF: [039-001]
A two-dimensional spatial region is a spatial region that is of two dimensions. (axiom label in BFO2 Reference: [039-001])
an infinitely thin plane in space.
the surface of a sphere-shaped part of space
three-dimensional spatial region