English-German translations for ellipse

A closed curve, the locus of a point such that the sum of the distances from that point to two other fixed points is constant; equivalently, the conic section that is the intersection of a cone with a plane that does not intersect the base of the cone
To remove from a phrase a word which is grammatically needed, but which is clearly understood without having to be stated

In Bs response to As question:- (A: Would you like to go out?, B: Id love to), the words that are ellipsed are go out.

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