A knoblike protuberance arising from a surface, as the prominence near the hinge of a bivalve shell or the projection at the scale tip of a seed-bearing cone.

 
  • 圆形隆起在一个表面突起的圆形装饰物似的隆起,如在双壳贝类贝壳边缘附近的突起或在含种子的球果顶端的突起。
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