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
sfi-ˈrȯi-dᵊl How to pronounce spheroid (audio)
adjective
or less commonly spheroid
spheroidally
sfi-ˈrȯi-dᵊl-ē How to pronounce spheroid (audio)
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.
Across each lumpy dark-gray spheroid cuts an uneven line. — Harmon Siegel, Artforum, 1 Oct. 2025 The new device is small and round—an oblate spheroid, technically. — ArsTechnica, 17 June 2026 Insights from a trophoblast spheroid model. — Daniella Gray, MSNBC Newsweek, 5 Dec. 2025 When the team inhibited AhR signaling, embryo-like spheroids attached more strongly to uterine cells. — Aamir Khollam, Interesting Engineering, 17 Dec. 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

Rhymes for spheroid

See All Rhymes for spheroid

Browse Nearby Words

spherograph
spheroid
spheroidal galaxy
See all Nearby Words

Cite this Entry

“Spheroid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spheroid. Accessed 7 Jul. 2026.

Copy Citation

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

Thesaurus: All synonyms and antonyms for 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!

Popular in Grammar & Usage

See More

Is that lie 'bald-faced' or 'bold-faced'?

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Why is '-ed' sometimes pronounced at the end of a word?

Commonly Misspelled Words

How to Use Em Dashes (—), En Dashes (–) , and Hyphens (-)
See More

Popular in Wordplay

See More

14 Phobias You Probably Haven't Heard Of

The Longest Long Words List

One-Word Oxymorons: Bittersweet, Spendthrift, and More

Ten Words Ending with a Silent ‘T’

12 Lovely and Unusual Words for the Natural World
See More

Popular

See More

Is that lie 'bald-faced' or 'bold-faced'?

14 Phobias You Probably Haven't Heard Of

The Longest Long Words List
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
hangman letters and game
Hangman Lightning Round Figure out which word fits in the blanks.
See All