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A spheroid, also known as an ellipsoid of revolution or rotational ellipsoid, is a quadric surface obtained by rotating an ellipse about one of its principal axes; in other words, an ellipsoid with two equal semi-diameters. A spheroid has circular symmetry.
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prolate oblate ellipse axis spheroids sphere axes shape ellipsoid earth used result also eccentricity surface equatorial flattening major body like
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Spheroid | is a | circumference of a sphere of equal volume as the spheroid and is given as | 0.90 | text |
| Spheroid | is a | approximate shape of rotating planets and other celestial bodies | 0.90 | text |
| Spheroid | is a | approximate shape of the ball used in American football and in rugby.Several moons of the Solar System approximate prolate spheroids in shape | 0.90 | text |
| the Crab Nebula | instance of | This combines with the smaller oblate distortion from the synchronous rotation to cause the body to become triaxial.The term is also used to describe the shape of some nebulae | 0.80 | text |
| testis may be measured by their long | instance of | near-spheroid organs | 0.80 | text |
| short axes.Many submarines have a shape which can be described as prolate spheroid.Dynamical propertiesFor a spheroid having uniform density | instance of | near-spheroid organs | 0.80 | text |
| the moment of inertia is that of an ellipsoid with an additional axis of symmetry | instance of | near-spheroid organs | 0.80 | text |
| short axes.Many submarines have a shape which can be described as prolate spheroid | instance of | near-spheroid organs | 0.80 | text |
| Spheroid | has application | The | 0.60 | section |
| Spheroid | has application | Deformed | 0.60 | section |
| Spheroid | has application | Spheroids | 0.60 | section |
| Spheroid | has application | Rotating | 0.60 | section |
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