1) Angular 2) Angulate 3) Having but one cusp 1) Angulate 
A unicuspid is a tooth that has only one cusp. ==In shrews== The dental formulas of shrews are distinguished by the number of unicuspids. All shrews have (in one half of each jaw) one large incisor followed by a variable number of unicuspids, followed by a complex premolar, followed by three molars. All shrews except for those of the genus Myosore...
Unicuspidate ... Having only one cusp, as a canine tooth. ... (05 Mar 2000) ... 
a tooth with a single cusp.
Type: Term Pronunciation: yū′ni-kŭs′pid, -kŭs′pi-dāt Definitions: 1. Having only one cusp, as a canine tooth.
Teeth with a single cusp or point, e.g. the simple conical teeth of insectivores.
[adj] - having a single cusp or point
adjective having a single cusp or point; `a unicuspid tooth`
having but one cusp.
A tooth with a single cusp. Usually applied to a set of teeth of shrews, but may be used for any such tooth, such as a canine tooth.