spher·​oid | \ ˈsfir-ˌȯid How to pronounce spheroid (audio) , ˈsfer- \

Definition of spheroid

: a figure resembling a sphere also : an object of approximately spherical shape

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Other Words from spheroid

spheroidal \ sfi-​ˈrȯi-​dᵊl How to pronounce spheroid (audio) \ or less commonly spheroid adjective
spheroidally \ sfi-​ˈrȯi-​dᵊl-​ē How to pronounce spheroid (audio) \ adverb

Examples of spheroid in a Sentence

Recent Examples on the Web The live feed appears on a spheroid TV that looks like an astronaut’s helmet and directly faces the Buddha. Washington Post, 31 July 2021 Because the Earth rotates, that shape gets compressed at the poles and bulges in the middle, forming a shape known as an oblate spheroid. Ethan Siegel, Forbes, 19 Mar. 2021 To take the curvature of the Earth into account, surveyors used spheroid models—rough, rounder precursors to the more mathematically complex ellipsoid models. Freddie Wilkinson, National Geographic, 28 Sep. 2020 In some cases, material from this disk forms a blob-like spheroid, but the YORP effect continues to shape it. Jennifer Leman, Popular Mechanics, 3 June 2020 But Earth is an oblate spheroid, meaning a 3D shape created by an ellipsis that’s rotating around its shorter axis—like a more rounded jelly donut. Caroline Delbert, Popular Mechanics, 12 Feb. 2020 The nucleus is a prolate spheroid, like a rugby ball, and should lead to discovery of more wobbly isotopes. Caroline Delbert, Popular Mechanics, 12 Feb. 2020 The team created a model of the ventral region by adding an extra protein to cortical spheroids at just the right time. Simon Makin, Scientific American, 24 Jan. 2020 Yet the integrity of the game continues to be threatened by a spheroid that costs about $9 and could be affected by even the simple act of a mosquito buzzing around the horsehide of a cow. Gabe Lacques, USA TODAY, 11 Dec. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'spheroid.' 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 spheroid

1570, in the meaning defined above

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The first known use of spheroid was in 1570

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Dictionary Entries Near spheroid



spheroidal galaxy

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Cite this Entry

“Spheroid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spheroid. Accessed 16 Oct. 2021.

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English Language Learners Definition of spheroid

: an object that is somewhat round but not perfectly round

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Thesaurus: All synonyms and antonyms for spheroid


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