Epicycloid

/ˈɛpɪsˌaɪklɔɪd/

Epicycloid

a line generated by a point on a circle rolling around another circle

Examples

1. I think these are called epicycloids, they're kind of like the spirograph patterns that you get rolling circles around circles.

2. and I mean for me it's kind of just a way to talk about the spirograph patterns, epicycloids, that you get from circles rotating around.