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  1. Oxford American Dictionary

    hyperbola

    • IPA[hīˈpərbələ]

    美式

    • n.
      a symmetrical open curve formed by the intersection of a circular cone with a plane at a smaller angle with its axis than the side of the cone.；the pair of hyperbolas formed by the intersection of a plane with two equal cones on opposites of the same vertex.

    • noun: hyperbola, plural noun: hyperbolae