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octahedron

American  
[ok-tuh-hee-druhn] / ˌɒk təˈhi drən /

noun

octahedrons, plural octahedra plural
  1. a solid figure having eight faces.


octahedron British  
/ ˌɒktəˈhiːdrən /

noun

  1. a solid figure having eight plane faces

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

octahedron Scientific  
/ ŏk′tə-hēdrən /
octahedrons plural
  1. A polyhedron that has eight faces.


Other Word Forms

Noun Inflected Forms

Etymology

Origin of octahedron

1560–70; < Greek oktáedron eight-sided (neuter of oktáedros ), equivalent to okta- octa- + -edron -hedron

Vocabulary lists containing octahedron

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

"Specifically, these molecules introduce in-plane hydrogen bonding that is compatible with both the ionic nature and octahedron spacing of halide perovskites," she said.

From Science Daily Jun. 6, 2024

All of this is enough to send any mother into a spiral of madness, or an even more elaborate shape — a Möbius strip of insanity, an octahedron of derangement.

From New York Times Jan. 11, 2022

As six ligands approach the metal ion along the axes of the octahedron, their point charges repel the electrons in the d orbitals of the metal ion.

From Textbooks Feb. 14, 2019

Octahedral complexes have a coordination number of six, and the six donor atoms are arranged at the corners of an octahedron around the central metal ion.

From Textbooks Feb. 14, 2019

Then SD-03 lifted the octahedron in its arms.

From "Ready Player One: A Novel" by Ernest Cline

To create the new structures, the researchers synthesized silver nanoparticles shaped like truncated octahedra, which they call "mecons."

From Science Daily May 30, 2026

The conduction path of pyrochlore-type structure cover the F ions located in the tunnels created by MO6 octahedra.

From Science Daily Apr. 2, 2024

On evaporating the solution dark purple octahedra of the alum are obtained.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" by Various

It is occasionally found as uneven cubes and octahedra, but more often as dendritic or earthy masses, with a blackish lead-grey colour and metallic lustre.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 5 "Arculf" to "Armour, Philip" by Various

Two misshapen or distorted octahedra are represented in figs.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" by Various

Adjacent octahedrons were rotated 90 degrees from one another and connected at the corners.

From Scientific American Aug. 20, 2021

These materials contained the rings of classic chain mail but also octahedrons with different angles or fewer cross struts.

From Scientific American Aug. 20, 2021

Scientists created a platinum alloy blended with nickel, forming three-dimensional shapes at the nanometer scale -- in this case, octahedrons.

From Scientific American Jun. 20, 2013

He built each piece originally in tiny paper tetrahedrons, octahedrons or dodecahedrons.

From Time Magazine Archive

Such ore is found in rich grey masses, yielding a black dust crystallized in regular octahedrons, highly magnetic, and in Europe the best quality of iron is made from it.

From The Mysterious Island by White, Stephen W.

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