ellipse
i lips
- n a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it
the sums of the distances from the foci to any point on an ellipse is constant
- For more than four months it had drifted away from the earth, coasting down a long ellipse toward the orbit of Venus.
- In an ellipse around each carbon atom and its companion hydrogen atom races still another brace of binding electrons.
- The plane of its ellipse is not the same as that of the moon's orbit but is nearly perpendicular to it.