Eight of these were incisors, the ninth (in the upper jaw) being a cuspid tooth.
This grading of form is not observed in passing from the cuspid to the bicuspid in man.
The laterals also show three cusps, while the cuspid has two very distinct.
cuspid cus·pid (kŭs'pĭd)
See canine tooth. adj.
Having one cusp; cuspidate.