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Ellipsoid vs. Ovoid: What's the Difference?

Edited by Aimie Carlson || By Harlon Moss || Published on November 20, 2023
An ellipsoid is a three-dimensional shape with elliptical cross-sections, while an ovoid is a broadly egg-shaped object, more irregular than an ellipsoid.

Key Differences

An ellipsoid is a geometric figure, a three-dimensional version of an ellipse. It has symmetrical, elliptical cross-sections and can have three distinct axes of symmetry.
Ovoid, on the other hand, refers to shapes that are broadly egg-like. It suggests a more organic, less mathematically defined form, often with one end larger than the other.
The ellipsoid is a precisely defined geometric term. Its shape can be mathematically described using equations, often used in physics and engineering.
In contrast, ovoid is a more general descriptor. It's used in various contexts, from biology to art, to describe shapes that are egg-like but not necessarily symmetrical or geometrically precise.
While both describe three-dimensional shapes, ellipsoids are mathematically exact, while ovoids are more loosely defined, capturing the essence of egg-like forms.

Comparison Chart


3D shape, elliptical forms
Broadly egg-shaped object


Symmetrical, defined axes
Generally asymmetrical


Mathematics, physics
Biology, general description


Mathematically precise
More organic, less precise

Shape Regularity

Regular, geometric
Irregular, organic

Ellipsoid and Ovoid Definitions


3D elliptical shape.
The earth is an oblate ellipsoid.


Loosely egg-shaped.
The vase had an ovoid appearance.


Geometry term.
We studied ellipsoids in math class.


Broadly egg-like form.
She painted an ovoid pattern.


Symmetrical 3D figure.
He modeled an ellipsoid in his project.


The ovoid sculpture stood in the garden.


Elliptical cross-sections.
The lamp’s ellipsoid design was unique.


Organic, asymmetrical shape.
The ovoid rock was intriguing.


Three axes of symmetry.
The ellipsoid had distinct axes.


Not mathematically precise.
The artist preferred ovoid forms.


A geometric surface, all of whose plane sections are either ellipses or circles.


Shaped like an egg
An ovoid fruit.
Ovoid spots.


A surface, all of whose cross sections are elliptic or circular (including the sphere), that generalises the ellipse and in Cartesian coordinates (x, y, z) is a quadric with equation x2/a2 + y2/b2 + z2/c2 = 1. Category:en:Surfaces


Are ellipsoids found in nature?

Rarely, most natural forms are more ovoid.

Can any egg-shaped object be ovoid?

Generally, if it resembles an egg.

Is an ellipsoid always symmetrical?

Yes, it has symmetrical axes.

Does ovoid imply irregularity?

It suggests organic, less precise shapes.

Are all ellipsoids 3D?

Yes, by definition.

Is ovoid a precise geometric term?

No, it's more descriptive than precise.

Can ovoid shapes be symmetrical?

Occasionally, but often they're not.

Can an ellipsoid have circular cross-sections?

Yes, in special cases like a sphere.

Is ellipsoid only a mathematical term?

Primarily, but used in other fields too.

Can ellipsoids be flattened?

Yes, like an oblate ellipsoid.

Does ellipsoid have a fixed formula?

Yes, its shape is mathematically defined.

Do ovoid shapes have uniform thickness?

Not necessarily; they can be variable.

Can ovoid be used in architecture?

Yes, for organic, egg-like designs.

Is ovoid used in biology?

Frequently, to describe cell shapes.

Are ovoid shapes common in nature?

Yes, many natural forms are ovoid.

Do artists use the term ovoid?

Yes, for egg-like forms in art.

How many axes does an ellipsoid have?

Usually three distinct axes.

Does ovoid imply a specific size?

No, it refers to shape, not size.

Are ellipsoids used in astronomy?

Yes, for celestial bodies' shapes.

Can ellipsoids be elongated?

Yes, like a prolate ellipsoid.
About Author
Written by
Harlon Moss
Harlon is a seasoned quality moderator and accomplished content writer for Difference Wiki. An alumnus of the prestigious University of California, he earned his degree in Computer Science. Leveraging his academic background, Harlon brings a meticulous and informed perspective to his work, ensuring content accuracy and excellence.
Edited by
Aimie Carlson
Aimie Carlson, holding a master's degree in English literature, is a fervent English language enthusiast. She lends her writing talents to Difference Wiki, a prominent website that specializes in comparisons, offering readers insightful analyses that both captivate and inform.

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