An ellipse
The answer will depend on what, if anything, the line segments have to do with the ellipse.
No.
The Ellipse (officially called President's Park South) is a 52-acre park located between the White House and the Washington Monument. Properly, the Ellipse is the name of the five-furlong circumference street within the park.
ellipse is the shape of an egg
Ellipse.
... is called an "ellipse"
An ellipse
Crescent. Ellipse.
An orbit, which is an ellipse.
The answer will depend on what, if anything, the line segments have to do with the ellipse.
An ellipse.
ellipse
Ellipse.
It is simply an elongated circle, possibly an oval but NOT an ellipse. It is not an ellipse because it has two straight sections. An ellipse is curved at all points along its perimeter.
This shape is called a lens, a biconvex shape comprising two circular arcs, joined at their endpoints. Loosely, it could be said to be an ellipse.
The path of an object in orbit around another object. It's a "conical section", shaped like a circle, but "flattened" in one direction (a circle can be considered a special case of an ellipse). An ellipse has two focal points.