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Từ điển Oxford Learners Wordfinder Dictionary
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
Syn:
oval
Derivationally related forms:
oval (for: oval), elliptic, elliptical
Hypernyms:
conic section, conic
Hyponyms:
circle

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