spheroid

noun

spher·​oid ˈsfir-ˌȯid How to pronounce spheroid (audio) ˈsfer- How to pronounce spheroid (audio)
Synonyms of spheroidnext
: 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
When the team inhibited AhR signaling, embryo-like spheroids attached more strongly to uterine cells. Aamir Khollam, Interesting Engineering, 17 Dec. 2025 Insights from a trophoblast spheroid model. Daniella Gray, MSNBC Newsweek, 5 Dec. 2025 Then, these pre-differentiated cells were assembled into spherical clusters known as spheroids, a formation that scientists have found aids tissue repair and regeneration. New Atlas, 23 Nov. 2025 Across each lumpy dark-gray spheroid cuts an uneven line. Harmon Siegel, Artforum, 1 Oct. 2025 See All Example Sentences for spheroid

Word History

First Known Use

1570, in the meaning defined above

Time Traveler
The first known use of spheroid was in 1570

Browse Nearby Words

Cite this Entry

“Spheroid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spheroid. Accessed 1 Jan. 2026.

Kids Definition

spheroid

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

More from Merriam-Webster on spheroid

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!