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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