Also found in: Thesaurus, Encyclopedia.


1. Of or relating to a tetrahedron.
2. Having four faces.

tet′ra·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.
References in periodicals archive ?
Segall, "Erratum: Elastic constants and related properties of tetrahedrally bonded BN, AlN, GaN, and InN [Physical Review.
This gel has a similar structure as the C-S-H gel in hydrated ordinary Portland cement and is made up of tetrahedrally coordinated silicate chains, where aluminium is located in the bridging position instead of silicon.
This structure (Al-O-Si) consisting of aluminium and silica is interlinked tetrahedrally by allotting alternate oxygen atoms.
At the core of the human CA active site, a zinc metal is tetrahedrally coordinated to three imidazole rings from His 94, 96, and 119 (using CA II numbering) [44-46].
ZnO is structurally described as a series of planes composed of fourfold tetrahedrally coordinated [O.sup.2-] and [Zn.sup.2+] ions stacked alternatively along the c-axis [18].
The unit cell of faujasite has 192 tetrahedrally coordinated atoms, which can be Al or Si.
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)).
(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.
However, the present study reveals that Vanadium oxide species incorporated in the zeolite framework form V5+ in a tetrahedrally coordinated environment.
The Zn atoms are tetrahedrally coordinate with four oxygens atoms [27-29], where the electrons of the d zinc layer hybridizes with the oxygen p layer, building the Zn-O alternating layers [13].
Upon [Mn.sup.2+] doping, a second characteristic emission band centered at around 582 nm is developed for the well-known [sup.4][T.sub.1] [right arrow] [sup.6][A.sub.x] d-d transition of [Mn.sup.2+] ions on [Zn.sup.2+] sites, where [Mn.sup.2+] is tetrahedrally coordinated by [S.sup.2-] [36,37].