It is called an ellipse.
a circle that has been flattened a little is an
Aa closed conic section shaped like a flattened circle
An elliptical base is a base that is shaped like a flattened circle. This is most common on objects that are cone shaped.
The shape of a flattened circle is called an ellipse. The shape is similar to an oval and some may mistakenly call it an oval.
it may be a cylender....
A wedge shaped portion of a circle is called a sector.
An elliptical galaxy