A surface of a posterior tooth or occlusion rim that is intended to make contact with an opposing occlusal surface. (The Journal of Prosthodontic Dentistry; The Glossary of Prosthodontic Terms; July 2005, page 57)
A device, one component of which is fixed to an abutment or abutments and the other is integrated into a fixed or removable prosthesis in order to stabilize and/or retain it.