nephroid ['nefrɔɪd]

例句:

• Construct rotating cardioid and nephroid while remaining orthogonal to each other.
  作旋转的心脏线和旋转的肾脏线,且彼此维持正交.
  
• Construct an animation displaying the deltoid sliding inside a fixed nephroid.
  建构一动态绘图:展示三角线沿著一固定的肾脏线内部滑动.
  
• Construct an animation displaying a nephroid of least size rotating about a fixed deltoid.
  作一个动态展示:一个最小形状的肾脏线在一个固定的三角线外滚动.