- An oval
- Flattened circle
- Oval
- Plane curve
- 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.
- Omission. See Ellipsis.
- The elliptical orbit of a planet.