cycloid
/ˈsaɪklɔɪd/noun
- Mathematics a curve (resembling a series of arches) traced by a point on a circle being rolled along a straight line【数】旋轮线, 摆线, 圆滚线。
派生词
cycloidal
adjective词源
mid 17th cent.: from Greek kukloeidēs 'circular', from kuklos 'circle'.