a "Flat circle thing that's flat" ;)
a circle that has been flattened a little is an
eclipse
The shape of Earth's orbit is an ellipse.
a monophelia
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.
An elliptical base is a base that is shaped like a flattened circle. This is most common on objects that are cone shaped.
Aa closed conic section shaped like a flattened circle
it may be a cylender....
A wedge shaped portion of a circle is called a sector.
its an flattened sphere
Ellipse
technically it's an ellipse, but if you called it an oval you wouldn't be too far wrong.