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Having eight plane surfaces.

oc′ta·he′dral·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Mathematics) having eight plane surfaces
2. (Mathematics) shaped like an octahedron
ˌoctaˈhedrally adv
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
In the crystals, magnesium atoms, octahedrally coordinated, join two-dimensional layers of tetrahedral Si[O.sub.4] units (with unshared oxygen atoms facing each other).
As shown in Figure 1, AFt phases are chemically and mineralogically complex, in which columns of [Ca.sub.6]Al[(OH).sub.6]*24[H.sub.2]O are lines of Al[(OH).sub.6.sup.3-] octahedrally bonded with three calcium polyhedrons, and each calcium polyhedron is with O[H.sup.-] and four water molecules, which presents an orientational column structure on the whole.
Bentonite is composed of two tetrahedrally coordinated sheets of silicon ions surrounding an octahedrally coordinated sheet of aluminum ions, the isomorphous substitution of [Al.sup.3+] for [Si.sup.4+] in the tetrahedral layer and [Mg.sup.2+] or [Fe.sup.3+] for [Al.sup.3+] in the octahedral layer results in a net negative surface charge on the layer, which makes it hold its physical and chemical properties, i.e., large specific surface area, cation exchange capacity, and adsorptive affinity for organic and inorganic ions [29, 30].
In this complex, the nickel ion is octahedrally coordinated with the trien ligand bonded through its four nitrogen atoms with the remaining two coordination sites occupied by 1-methylimidazole ligands.
F-NPs are metal oxides with spinel structure with an [AB.sub.2][O.sub.4] formula, where A and B are cations located tetrahedrally (A atom; smaller and two per unit) and octahedrally (B atom; larger and four per unit) coordinated to oxygen atoms, respectively (Figure 1(b)).
In ruby, [Cr.sup.3+] ions substitute for some [Al.sup.3+] ions, occupying similar octahedrally coordinated, off-center lattice positions.
(1988) documented substitutions involving F[e.sup.2]+, M[g.sup.2]+, M[n.sup.2]+, F[e.sup.3]+, C[r.sup.3]+, [V.sup.5]+, and S[c.sup.3]+, as well as [V.sup.5]+ and T[i.sup.4]+, for octahedrally coordinated aluminum, as well as lithium for tetrahedrally coordinated beryllium.
The octahedral alumina sheet consists of close-packed oxygen or hydroxyls between which octahedrally coordinated aluminum atoms are present.
ZnSn[(OH).sub.6] (ZHS) is a class of perovskite-structured hydroxide, in which the metal atoms are octahedrally coordinated with oxygen atoms [15].
ZnO enters the network with Zn[O.sub.4] structural unit as a glass forming oxides while octahedrally coordinated as network modifier.
Happek, "Luminescence of octahedrally coordinated [Eu.sup.2+] in [Rb.sub.2]M[P.sub.2][O.sub.7] (M = Ca, Sr)," ECS Transactions, Vol.