A great circle drawn on a terrestrial globe, used for illustrating and solving astronomical problems.
The great circle on the celestial sphere that is the mean apparent path of the sun as viewed from the earth.
Also, the plane in which this great circle lies.
Relating to an eclipse or the ecliptic.
An elongated round shape resembling an egg or ellipse.
A thing having such a shape, such as an arena.
In a projective plane, a set of points such that no three are collinear and there is a unique tangent line at each point.
A sports field, typically but not exclusively oval in shape.
Of or pertaining to an ovum.
Having the shape of an oval.