AskDefine | Define ovoid

Dictionary Definition

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

User Contributed Dictionary



  1. Shaped like an oval.
  2. Egg-shaped; shaped like an oval, but more tapered at one end; ovate.

Related terms



  1. Something that is oval in shape.

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: The word ovoidal refers to the characteristic of being an ovoid.
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

ovoid in German: Oval (Geometrie)
ovoid in Spanish: Óvalo (geometría)
ovoid in French: Ovale
ovoid in Italian: Ovale
ovoid in Georgian: ოვალი
ovoid in Lithuanian: Ovalas
ovoid in Dutch: Ovaal
ovoid in Japanese: オーバル
ovoid in Polish: Owal
ovoid in Russian: Овал
ovoid in Simple English: Oval
ovoid in Slovenian: Oval (geometrija)
ovoid in Serbian: Овал

Synonyms, Antonyms and Related Words

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