Cubit 15.8 User Documentation
Geometry can be deleted from the model using the following command:
Delete [Body | Surface | Curve | Vertex] <id_range>
Any type of Body can be deleted, whether it is based on solid model geometry or another representation. Other entities (Surface, Curve, Vertex) can be deleted when they are "free", i.e. when they are not contained in an entity of higher topological order (Body, Surface or Curve, respectively); this type of geometry is often created from the lowest order topology up.