hypocycloid
英[\'haɪpəʊ\'saɪklɔɪd]
美[ˌhaɪpoʊ\'saɪˌklɔɪd]
基本释义
- n.
- 圆内旋轮线，内摆线
英英释义
Noun
1. a line generated by a point on a circle that rolls around inside another circle