geoid

noun
ge·​oid | \ ˈjē-ˌȯid How to pronounce geoid (audio) \

Definition of geoid

: the surface within or around the earth that is everywhere normal to the direction of gravity and coincides with mean sea level in the oceans

Other Words from geoid

geoidal \ jē-​ˈȯi-​dᵊl How to pronounce geoid (audio) \ adjective

Examples of geoid in a Sentence

Recent Examples on the Web When the geoid is above the ellipsoid, the difference is subtracted. Freddie Wilkinson, National Geographic, 28 Sep. 2020 The vertical distance from a location on the Earth’s surface to mean sea level, as represented by the geoid. Freddie Wilkinson, National Geographic, 28 Sep. 2020 The newest update, however, will use a new mean sea level reference point known as a geoid. Keith Matheny, Detroit Free Press, 2 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'geoid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of geoid

1881, in the meaning defined above

History and Etymology for geoid

German, from Greek geoeidēs earthlike, from

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Cite this Entry

“Geoid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/geoid. Accessed 25 Jan. 2022.

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More from Merriam-Webster on geoid

Britannica.com: Encyclopedia article about geoid

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