A cusp is an
occlusal or incisal eminence on a tooth. Canine teeth, otherwise known as cuspids, each possess a single cusp, while premolars, otherwise known as bicuspids, possess two each. Molars normally possess either four or five cusps. Maxillary molars, especially first molars, will generally possess a fifth cusp situated on the mesiolingual cusp known as the Cusp of Carabelli.