onyx

noun

on·​yx ˈä-niks How to pronounce onyx (audio)
: a translucent chalcedony in parallel layers of different colors

Examples of onyx in a Sentence

Recent Examples on the Web
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Made-to-order by artisans in Italy, the base of this onyx roost, with its cushioned base, is a nod to Art Deco. Kathryn O’Shea-Evans, Robb Report, 29 Mar. 2026 This deep, rich shade of onyx hides the RX’s peculiar body lines the same way a black T-shirt slims down a belly full of beer. Jesus R. Garcia, Houston Chronicle, 29 Mar. 2026 Griggs and his fellow expeditioners were walking through the aftermath of the 20th century’s most prolific act of volcanism — a 60-hour frenzy that smothered much of the Pacific Northwest in onyx snow. Quanta Magazine, 27 Mar. 2026 Those treasures include antique haberdashery walls, an onyx entry table, and a jewelry case reupholstered in kilim with guitar-strap trim, and plenty of personal touches like family photos, all meant to inspire your next purchase, too. Stacey Leasca, Travel + Leisure, 12 Mar. 2026 See All Example Sentences for onyx

Word History

Etymology

Middle English oniche, onyx, from Anglo-French & Latin; Anglo-French, from Latin onych-, onyx, from Greek, literally, claw, nail — more at nail

First Known Use

14th century, in the meaning defined above

Time Traveler
The first known use of onyx was in the 14th century

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Cite this Entry

“Onyx.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/onyx. Accessed 5 Apr. 2026.

Kids Definition

onyx

noun
on·​yx ˈän-iks How to pronounce onyx (audio)
: chalcedony in parallel layers of different color

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