| 单词 | cusp |
| 释义 | cusp n. 1. an apex or peak. 2. the horn of a crescent moon etc. 3. Astrol. the initial point of a house. 4. Archit. a projecting point between small arcs in Gothic tracery. 5. Geom. the point at which two arcs meet from the same direction terminating with a common tangent. 6. Bot. a pointed end, esp. of a leaf. 7. a cone-shaped prominence on the surface of a tooth esp. a molar or premolar. 8. a pocket or fold in a valve of the heart. Derivatives cuspate adj. cusped adj. cuspidal adj. Etymology: L cuspis, -idis point, apex |
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