noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   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”).

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.