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A curve traced by a point in the circumference of a circle which rolls on the convex side of a fixed circle.
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A curve generated by the motion of a point on the circumference of circle which rolls on the convex side of a fixed circle.
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a line generated by a point on a circle rolling around another circle
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a path generated by a circle on a circle, which is how this tooth profile is produced
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In geometry, an epicycloid is a plane curve produced by tracing the path of a chosen point of a circle — called epicycle — which rolls around without slipping around a fixed circle. It is a particular kind of roulette.
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