An ovoid is an egg-shaped curve. Lockwood (1967, p. 157) calls the negative pedal curve of an ellipse
with respect to a focus an ovoid when the eccentricity
of the ellipse satisfies 
.
This focal negative pedal curve is Burleigh's
oval.
Ovoid
See also
Burleigh's Oval, OvalExplore with Wolfram|Alpha
References
Lockwood, E. H. A Book of Curves. Cambridge, England: Cambridge University Press, p. 157, 1967.Referenced on Wolfram|Alpha
OvoidCite this as:
Weisstein, Eric W. "Ovoid." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Ovoid.html