A curve described by the → polar equationr2 = 4b (a - b sin2θ),
where a and b are positive constants. For appropriate
values of a and b, the curve looks like the infinity symbol, ∞.
See also → spheres of Eudoxus.
Hippopede, literally "a horse's foot," denoting a "horse fetter (hobble),"
from Gk. hippos, → horse, + -pede
variant of -ped, combining form of pos,→ foot.