| 单词 | ellipse |
| 释义 | ellipse (once / 2401 pages) n An ellipse is a closed-plane curve that results from the intersection of a plane cutting through a cone. In other words, it’s an oval. This is a word you'll probably see in geometry class, though it's a shape you can find all over the place. An ellipse is a closed curve that never made it around to a circle. If one thing travels around another in the shape of an ellipse — like the earth around the sun — it has an elliptical orbit. The plural for both ellipse and ellipsis is ellipses — so be careful not to mix up your ovals with your dots. WORD FAMILYellipse: ellipsoid, elliptic, elliptical+/ellipsoid: ellipsoidal, ellipsoids/elliptic: elliptically, ellipticity USAGE EXAMPLESThose sites include the Ellipse and Lafayette Park on either side of the White House. Seattle Times(Dec 07, 2016) The lighting will take place on the Ellipse at the White House, and President Obama is expected to deliver a few remarks during the event. Time(Dec 01, 2016) The tree is on the Ellipse south of the White House. Washington Times(Nov 17, 2016) n 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|Hypo|Hyper oval circle ellipse in which the two axes are of equal length; a plane curve generated by one point moving at a constant distance from a fixed point circle of curvature, osculating circlethe circle that touches a curve (on the concave side) and whose radius is the radius of curvature circleta small circle equatora circle dividing a sphere or other surface into two usually equal and symmetrical parts epicyclea circle that rolls around (inside or outside) another circle; generates an epicycloid or hypocycloid conic, conic section (geometry) a curve generated by the intersection of a plane and a circular cone |
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