ellipse love

ellipse

Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

• n. A plane curve, especially:
• n. A conic section whose plane is not parallel to the axis, base, or generatrix of the intersected cone.
• n. The locus of points for which the sum of the distances from each point to two fixed points is equal.
• n. Ellipsis.

• n. A closed curve, the locus of a point such that the sum of the distances from that point to two other fixed points (called the foci of the ellipse) 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.
• v. To remove from a phrase a word which is grammatically needed, but which is clearly understood without having to be stated.

from the GNU version of the Collaborative International Dictionary of English

• n. 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.
• n. Omission. See Ellipsis.
• n. The elliptical orbit of a planet.

from The Century Dictionary and Cyclopedia

• n. In geometry, a plane curve such that the sums of the distances of each point in its periphery from two fixed points, the foci, are equal.

• n. a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it

Etymologies

French, from Latin ellīpsis, from Greek elleipsis, a falling short, ellipse, 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) : en-, in.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From French ellipse. (Wiktionary)