Englishfor English speakers
real
Adjective
—
A thing that is true is real.
Strange as the story sounded, the story was real.
—
Something that is not artificial is real.
The nice shoes were of real leather.
ellipse
—
noun
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