An oval is simply two circles joined at the sides by straight edges. From your x/y comments (moved to discussion) I would assume what you're trying to draw is an ellipse, which the link below describes (it also shows an oval).
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An ellipse is the proper name for an oval shape, however, a circle is a closed curved shape similar to an oval shape.
Oval kind of a heart shape but its mostly oval
An oval is two-dimensional. An ovoid is a three-dimensional shape based on an oval - like an egg,
long oval shape
The shape of an egg.