ellipsoid

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ellipsoid

/ɪˈlɪp.sɔɪd/ UK
/ɪˈlɪp.sɔɪd/ US
/əˈlɪp.sɔɪd/ US
/iˈlɪp.sɔɪd/ US
/əˈlɪp.soɪd/ Australia
/ɪˈlɪp.soɪd/ Australia

noun ellipsoids

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. Polarizability can be imagined as a three-dimensional ellipsoid centred on the centre of the molecule, as shown in Figure 10.4.
Such a surface used as a model of the shape of the earth. Here the geoid is thirty meters below the ellipsoid.

adjective more ellipsoid · most ellipsoid

Shaped like an ellipse; elliptical.
Of or pertaining to an ellipse; elliptic.
Having the tridimensional shape of an ellipse rotated on its long axis.

Translations

Every language

noun surface all of whose cross sections are elliptic or circular

Español	elipsoide
中文	橢球 /椭球 tuǒqiú
Português	elipsoide
Français	ellipsoïde
Deutsch	Ellipsoid, Ellipsoide
Italiano	ellissoide
Română	elipsoid
Русский	эллипсо́ид ellipsóid
Tiếng Việt	ê-líp-xô-ít, elipxoit

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MLA

"ellipsoid." Wiktionary, via Micwyn, micwyn.com/word/ellipsoid. Accessed 6 Nov. 2026.

APA

ellipsoid. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/ellipsoid

Chicago

"ellipsoid." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/ellipsoid.

BibTeX

@misc{ellipsoid_2026,
  title = {ellipsoid},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/ellipsoid},
  urldate = {2026-11-06}
}