1
: having eight plane faces
2
: of, relating to, or formed in octahedrons

Examples of octahedral 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.
The diamond in the ring is uncut, retaining its natural octahedral crystal form and simply polished rather than faceted. — Anthony Demarco, Forbes.com, 27 Jan. 2026 This takes pride of place between the ground and first floors, while a chandelier by Italian glass specialist Venini nods to the stone’s octahedral crystal conformation. — Lily Templeton, Footwear News, 19 Jan. 2026 The researchers constructed it from hollow octahedral subunits that interlock but are able to move against one another. — Lars Fischer, Scientific American, 20 Aug. 2021

Word History

First Known Use

1684, in the meaning defined at sense 1

Time Traveler
The first known use of octahedral was in 1684

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Cite this Entry

“Octahedral.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/octahedral. Accessed 26 Sep. 2026.

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