Oval

An oval (from Latin ovum 'egg') is a closed curve in a plane which resembles the outline of an egg.

Generally, to be called an oval, a plane curve should resemble the outline of an egg or an ellipse.

Although the term egg-shaped usually implies a lack of reflection symmetry across the equatorial plane, it may also refer to true prolate ellipsoids.

In common speech, "oval" means a shape rather like an egg or an ellipse, which may be two-dimensional or three-dimensional.

It also often refers to a figure that resembles two semicircles joined by a rectangle, like a cricket infield, speed skating rink or an athletics track.

This oval, with only one axis of symmetry, resembles a chicken egg.
To the definition of an oval in a projective plane
To the definition of an ovoid
An oval with two axes of symmetry constructed from four arcs (top), and comparison of blue oval and red ellipse with the same dimensions of short and long axes (bottom).
A speed skating rink is often called an oval