In geometry, an oval or ovoid (from Latin ovum, 'egg') is any curve resembling an egg or an ellipse. Unlike other curves, the term 'oval' is not well-defined and many distinct curves are commonly called ovals. These curves have in common that:
Curve Reflection symmetry Ellipse Egg (food) Squoval Oval (projective plane) Principal axis Collinearity Cassini oval Prolate spheroid Superellipse Plane curve Rotational symmetry Projective plane Ellipsoid Elliptic curve Oblate spheroid Finite field Shape Convex set Semi-major axis
