hippopede means A plane curve defined by the equation (x²+y²)²=cx²+dy², where it is assumed that c>0 and c>d.
Etymology
Borrowed from Ancient Greek ἱπποπέδη (hippopédē, “horse fetter”).
noun
- A plane curve defined by the equation (x²+y²)²=cx²+dy², where it is assumed that c>0 and c>d.