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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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