hyperellipse

Etymology
From.

Noun

 * 1)  A superellipse: a curve in two dimensions of a certain type, a generalization of the ellipse.
 * 2) * 2003, M. M. Yovanovich and E. E. Marotta, "Thermal Spreading and Contact Resistances", chapter 4 of Adrian Bejan and Allan D. Kraus (editors), Heat Transfer Handbook, Wiley-IEEE, ISBN 978-0-471-39015-2, page 286:
 * The hyperellipse is defined by ( x / a )n + ( y / b )n = 1 with b ≤ a, where n is the shape parameter and a and b are the axes along the x and y axes, respectively.
 * 1)  Specifically, a superellipse with an exponent (shape parameter) greater than that of the ellipse (two).
 * 2)  A multi-dimensional manifold of a certain type, a generalization of the ellipse and ellipsoid.