Epitrochoid - definition of epitrochoid by The Free Dictionary
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a geometric curve traced by a fixed point in one circle rotating around another fixed circle
References in periodicals archive
As can be seen in Figure 1, the "X" engine rotor has the same epitrochoid
shape as the Wankel housing.
Download from the App Store and play around with this neat app that renders sounds of solfeggio with colorful mandala-based images whose shapes are inspired by hypotrichoids and epitrochoids