hippopede

Borrowed from Ancient Greek ἱπποπέδη (hippopédē, “horse fetter”).

hippopede (plural hippopedes)

1. A plane curve defined by the equation ${\displaystyle (x^{2}+y^{2})^{2}=cx^{2}+dy^{2}}$, where it is assumed that ${\displaystyle c>0}$ and ${\displaystyle c>''d''}$.

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