Etymology: ME, stampen + L, cuspis, point
a tooth cusp that works in a fossa, such as any of the maxillary lingual cusps.
stamp cusp(stamp kŭsp)
A tooth cusp that, when the tooth is in occlusion, fits in the fossa of the antagonist in a mortar-and-pestle fashion.
n a cusp made to work in a fossa. The maxillary lingual cusps are stamp cusps. In tooth-to-tooth occlusion all mandibular buccal cusps may stamp into fossae. In tooth-to-two-tooth occlusion the stamp cusps of the mandibular premolars may have their tips in embrasures and have only their shoulders in tiny fossae. See also cusp-fossa relations.