antimony

noun

an·​ti·​mo·​ny ˈan-tə-ˌmō-nē How to pronounce antimony (audio)
1
: stibnite
2
: a trivalent and pentavalent metalloid element with atomic number 51 that commonly occurs in a brittle, metallic, silvery white crystalline form and that is used especially in alloys, semiconductors, and flame-retardant substances see Chemical Elements Table

Examples of antimony 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.
There, Nova will focus on the production of something called antimony trisulfide. — Christopher McFadden, Interesting Engineering, 30 Aug. 2026 See All Example Sentences for antimony

Word History

Etymology

Middle English antimonie, from Medieval Latin antimonium

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of antimony was in the 15th century

Rhymes for antimony

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Browse Nearby Words

anti-monopoly
antimony
antimony blende
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Cite this Entry

“Antimony.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antimony. Accessed 6 Sep. 2026.

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Kids Definition

antimony

noun
an·​ti·​mo·​ny ˈant-ə-ˌmō-nē How to pronounce antimony (audio)
: a metallic silvery white element that is used especially in alloys and medicine see element

Medical Definition

antimony

noun
an·​ti·​mo·​ny ˈant-ə-ˌmō-nē How to pronounce antimony (audio)
plural antimonies
: a trivalent and pentavalent metalloid element that is commonly metallic silvery white, crystalline, and brittle and is used especially in alloys and semiconductors and in medicine as a constituent of various antiprotozoal agents (as tartar emetic)
—symbol Sb see Chemical Elements Table

More from Merriam-Webster on antimony

Britannica.com: Encyclopedia article about antimony

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