epicycloid

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epicycloid

[‚ep·ə′sī‚klȯid]
(mathematics)
The curve traced by a point on a circle as it rolls along the outside of a fixed circle.
References in periodicals archive ?
The holes for spark plugs and exhaust manifolds (see figure bellow), which goes through the combustion chamber, should be executed after the epicycloid profile.
The epicycloid curve is generated by a fixed point P, related to a circle, which is rolling slidingless outside of another fixed circle, as in figure 2.