A hole, though shaped like an ellipse, in which this well-hung stud had placed it would look as if a compass traced it.
On Dec. 18, a triumphant Johnson appeared on the ellipse outside the White House to light the national Christmas tree.
If both pins were driven into the same hole, what kind of an ellipse would you get?
The earth's orbit is an ellipse, one of the foci of which is occupied by the sun.
One pin (E) is movable along in a slot, but is adjustable at any point so that the shape of the ellipse may bep.
Each one is called a focus, and an ellipse can only have one pair of foci.
The curve thus traced will be an ellipse having the pins at the two points which are called its foci.
From the observations of the planet the ellipse in which it moves can be ascertained.
The plan of the grate of the furnace is an ellipse: fig. 73.
The apparent path of the star is no longer a circle; it has become an ellipse.
1753, from French ellipse (17c.), from Latin ellipsis "ellipse," also, "a falling short, deficit," from Greek elleipsis (see ellipsis). So called because the conic section of the cutting plane makes a smaller angle with the base than does the side of the cone, hence, a "falling short." First applied by Apollonius of Perga (3c. B.C.E.).
In geometry, a curve traced out by a point that is required to move so that the sum of its distances from two fixed points (called foci) remains constant. If the foci are identical with each other, the ellipse is a circle; if the two foci are distinct from each other, the ellipse looks like a squashed or elongated circle.
Note: The orbits of the planets and of many comets are ellipses.