ellipse

Từ điển WordNet v3.1 - WordNet Dictionary

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