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ellipse    音標拼音: [ɪl'ɪps]
n. 橢圓形,橢圓,
n. 橢圓

橢圓形,橢圓,橢圓

ellipse
橢圖形

ellipse
n 1: 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" [synonym: {ellipse}, {oval}]

Ellipse \El*lipse"\ ([e^]l*l[i^]ps"), n. [Gr. 'e`lleipsis,
prop., a defect, the inclination of the ellipse to the base
of the cone being in defect when compared with that of the
side to the base: cf. F. ellipse. See {Ellipsis}.]
1. (Geom.) An oval or oblong figure, bounded by a regular
curve, which corresponds to an oblique projection of a
circle, or an oblique section of a cone through its
opposite sides. The greatest diameter of the ellipse is
the major axis, and the least diameter is the minor axis.
See {Conic section}, under {Conic}, and cf. {Focus}.
[1913 Webster]

2. (Gram.) Omission. See {Ellipsis}.
[1913 Webster]

3. The elliptical orbit of a planet.
[1913 Webster]

The Sun flies forward to his brother Sun;
The dark Earth follows wheeled in her ellipse.
--Tennyson.
[1913 Webster]

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