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  1. Oxford American Dictionary

    cusp

    • IPA[kəsp]

    美式

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

    • noun: cusp, plural noun: cusps

    • 釋義

    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 projecting point between small arcs in Gothic tracery.
    • ▪ a cone-shaped prominence on the surface of a tooth, especially of a molar or premolar.
    • ▪ a pocket or fold in the wall of the heart or a major blood vessel that fills and distends if the blood flows backward, 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.
    • 3. the initial point of an astrological sign or house he was Aries on the cusp with Taurus