# Dictionary Definition

oval adj : rounded like an egg [syn: egg-shaped,
elliptic, elliptical, ovate, oviform, ovoid, prolate] 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:
ellipse]

# User Contributed Dictionary

see Oval

## English

- Note: an ellipse is a precise mathematical shape, but an oval is not.

#### Translations

### Adjective

- Having the shape of an oval.

#### Translations

# Extensive Definition

In geometry, an oval or ovoid (from Latin ovum,
'egg') is any curve
resembling an egg or an
ellipse. Unlike other
curves, the term 'oval' is not well-defined and many distinct
curves are commonly called ovals. These curves have in common that:

- they are differentiable (smooth-looking), simple (not self-intersecting), convex, closed, plane curves;
- their shape does not depart much from that of an ellipse, and
- there is at least one axis of symmetry.

Other examples of ovals described elsewhere
include:

## Egg shape

The shape of an egg is approximately that of half each a prolate (long) and roughly spherical (potentially even minorly oblate/short) ellipsoid joined at the equator, sharing a principal axis of rotational symmetry, as illustrated above. Although the term egg-shaped usually implies a lack of reflection symmetry across the equatorial plane, it may also refer to true prolate ellipsoids. It can also be used to describe the 2-dimensional figure that, revolved around its major axis, produces the 3-dimensional surface.## Projective planes

In the theory of projective
planes, oval is used to mean a set of q + 1 non-collinear points in PG(2,q),
the projective plane over the finite field
with q elements. See oval
(projective plane).

## See also

oval in German: Oval (Geometrie)

oval in Spanish: Óvalo (geometría)

oval in French: Ovale

oval in Italian: Ovale

oval in Georgian: ოვალი

oval in Lithuanian: Ovalas

oval in Dutch: Ovaal

oval in Japanese: オーバル

oval in Polish: Owal

oval in Russian: Овал

oval in Simple English: Oval

oval in Slovenian: Oval (geometrija)

oval in Serbian: Овал

# Synonyms, Antonyms and Related Words

archery ground, athletic field, badminton court,
baseball field, basketball court, billiard parlor, bowling alley,
bowling green, course,
court, cricket ground,
croquet ground, croquet lawn, diamond, egg-shaped, ellipse, ellipsoidal, elliptic, elliptical, fairway, field, football field, glaciarium, golf course, golf
links, gridiron,
gym, gymnasium, ice rink, infield, links, obovate, obovoid, outfield, ovate, oviform, ovoid, ovule, playground, playing field,
playroom, polo ground,
pool hall, poolroom,
putting green, racecourse, racket court,
rink, skating rink, soccer
field, squash court, stretch, tennis court, track, turf