INFINITESIMAL Synonyms: 119 Similar and Opposite Words

infinitesimal

adjective

(ˌ)in-ˌfi-nə-ˈte-sə-məl

Definition of infinitesimal

as in tiny

very small in size a soft drink with only an infinitesimal amount of caffeine

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

Example Sentences

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.

Recent Examples of infinitesimal The amount may be infinitesimal—white sugar and bottled water are sometimes purified with charred animal bones, for instance—but some hypersensitive alpha-gal patients avoid the risk anyway. — Burkhard Bilger, New Yorker, 29 June 2026 To precisely print transistors at these infinitesimal scales, light with an incredibly short wavelength must be used. — Rob Toews, Forbes.com, 22 June 2026 Because, through most of this review period, where an infinitesimal fraction of the launch player base has access to the game, those parking spots have not been filled. — Adam Ismail, The Drive, 14 May 2026 Over the course of decades, people inevitably evolve in both infinitesimal and significant ways. — Patricia Neligan, AJC.com, 7 May 2026 See All Example Sentences for infinitesimal

Recent Examples of Synonyms for infinitesimal

Adjective

Commonly associated with environmental risk factors such as smoking or exposure to hazards like radon, the rare but aggressively fast-growing condition gets its name from the unusually tiny appearance of its cells.

— New Atlas, New Atlas, 15 Oct. 2026
These tiny architects of the deep sea actively regulate microbial populations.

— Mrigakshi Dixit, Interesting Engineering, 14 Oct. 2026

Definition of tiny

Adjective

These informative passages function similarly to footnotes, but without the disruption of having to read minuscule print at the bottom of the page.

— Heller McAlpin, Christian Science Monitor, 16 Oct. 2026
Study after study, by public officials and think tanks, has shown that voting by noncitizens and other ineligible voters happens only at minuscule, statistically insignificant levels.

— Christopher Miller, The Conversation, 15 Oct. 2026

Definition of minuscule

Adjective

Unlike conventional nuclear reactors, City Labs develops microscopic power sources that generate electricity and heat through the natural decay of tritium.

— Christopher McFadden, Interesting Engineering, 16 Oct. 2026
Root’s climate-tech company, Matter, created Regen, a universal, reusable, and self-cleaning filter for laundry machines that captures up to 97% of microscopic clothing fibers that would otherwise end up in wastewater systems.

— Matt Alderton, Time, 15 Oct. 2026

Definition of microscopic

Browse Nearby Words

infinite

infinitesimal

infinitesimally

See all Nearby Words

Podcast

Cite this Entry

Style

“Infinitesimal.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infinitesimal. Accessed 21 Oct. 2026.

Copy Citation

Synonyms of infinitesimal

adjective

Example Sentences

Browse Nearby Words

Podcast

Cite this Entry

More from Merriam-Webster on infinitesimal

More from Merriam-Webster

Word of the Day

jilt

Popular in Grammar & Usage

Merriam-Webster’s Great Big List of Words You Love to Hate

'Can' vs. 'May'

'Affect' vs. 'Effect'

More Commonly Mispronounced Words

Is it 'nerve-racking' or 'nerve-wracking'?

Popular in Wordplay

The Longest Long Words List

9 Words That Sound Like Insults But Aren't

Did 'orange' the fruit or the color come first?

Even More Bird Names that Sound Like Insults (and Sometimes Are)

12 Lovely and Unusual Words for the Natural World

Popular

Merriam-Webster’s Great Big List of Words You Love to Hate

The Longest Long Words List

9 Words That Sound Like Insults But Aren't

Games & Quizzes