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1. Oxford Dictionary

   cusp

   • IPA[kʌsp]

   英式

   • n.
     a point of transition between two different states；a pointed end where two curves meet.

   • noun: cusp, plural noun: cusps

2. • 釋義

   n.

   名詞

   • 1. a point of transition between two different states those on the cusp of adulthood
   • 2. a pointed end where two curves meet.
   • ▪ a moulded projection at the point of a small arch in Gothic tracery.
   • ▪ a cone-shaped prominence on the surface of a tooth.
   • ▪ a pocket or fold in the wall of the heart or a major blood vessel that fills and distends if the blood flows backwards, so forming part of a valve.
   • ▪ a point at which the direction of a curve is abruptly reversed.
   • ▪ each of the pointed ends of the crescent moon.
   • ▪ a sharp rigid point of a leaf.
   • 3. the initial point of an astrological sign or house he was Aries on the cusp with Taurus
3. • 更多解釋

   cusp

   • IPA[kəsp]

   美式

   • n.
     a point of transition between two different states: those on the cusp of adulthood

   Oxford American Dictionary