[kuhsp] 
| 1. | a point or pointed end. |
| 2. | Anatomy, Zoology, Botany. a point, projection, or elevation, as on the crown of a tooth. |
| 3. | Also called spinode. Geometry. a point where two branches of a curve meet, end, and are tangent. |
| 4. | Architecture. a decorative device, used esp. in Gothic architecture to vary the outlines of intradoses or to form architectural foils, consisting of a pair of curves tangent to the real or imaginary line defining the area decorated and meeting at a point within the area. |
| 5. | Astronomy. a point of a crescent, esp. of the moon. |
| 6. | Astrology.
|
| 7. | a point that marks the beginning of a change: on the cusp of a new era. |
cusp (kŭsp)
n.
A pointed or rounded projection on the chewing surface of a tooth.
A triangular fold or flap of a heart valve.