名詞 ellipse:

1. a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it
   同義詞：oval

el.lipse

n.（名詞）
A plane curve, especially:
橢圓：一個平面曲線，尤指：
A conic section whose plane is not parallel to the axis, base, or generatrix of the intersected cone.
圓錐的一部分，其切面既不平行于軸和基面，也不平行于圓錐母線
The locus of points for which the sum of the distances from each point to two fixed points is equal.
橢圓：到兩定點的距離的和為常數(shù)的點的軌道
Ellipsis.
省略號

來源：
French
法語
from Latin ellopsis
源自 拉丁語 ellopsis
from Greek elleipsis
源自 希臘語 elleipsis
from elleipein [to fall short (from the relationship between the line joining the vertices of a conic and the line through the focus and parallel to the directrix of a conic)] * see ellipsis
源自 elleipein [變短（源自于連接圓錐頂點的線和過焦點且平行于圓錐準線的線之間的關系）] *參見 ellipsis