spher·​oid ˈsfir-ˌȯid How to pronounce spheroid (audio)
: a figure resembling a sphere
also : an object of approximately spherical shape
spheroidal adjective
or less commonly spheroid
spheroidally adverb

Examples of spheroid in a Sentence

Recent Examples on the Web In general the studies kept the airway spheroids embedded and immobilized in a protein-rich gel called Matrigel. Philip Ball, Scientific American, 1 Dec. 2023 But tiny glass spheroids riddle the lunar regolith—the rock chips and other loose material covering the lunar surface. Rahul Rao, Popular Science, 9 Nov. 2023 With such a resume, H. erectus may have possessed the know-how to fashion a spheroid. Matt Hrodey, Discover Magazine, 18 Sep. 2023 The authors argue that such large numbers of spheroids could only have come from human hands. Matt Hrodey, Discover Magazine, 18 Sep. 2023 But because the earth is an oblate spheroid, the sea level at the Equator is some 14 miles farther from the center of the earth than the sea level at the North Pole. Mark Fischetti, Scientific American, 1 Feb. 2023 Unlike baseball or basketball, the American football relies on a spiral rotation because of its prolate spheroid shape. Jocelyn Solis-Moreira, Popular Science, 6 Feb. 2023 Planet Earth is shaped more like an oblate spheroid which looks like a flatter circle. Emy Rodriguez Flores, Popular Mechanics, 10 Jan. 2023 That has a physical difference when gripping an object shaped like a prolate spheroid. Andrew Beaton, WSJ, 27 Jan. 2022

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'spheroid.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1570, in the meaning defined above

Time Traveler
The first known use of spheroid was in 1570

Dictionary Entries Near spheroid

Cite this Entry

“Spheroid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spheroid. Accessed 25 May. 2024.

Kids Definition


spher·​oid ˈsfi(ə)r-ˌȯid How to pronounce spheroid (audio)
: a figure resembling a flattened sphere

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