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

tet′ra·he′dral·ly adv.


(ˌtɛ trəˈhi drəl)

1. pertaining to or having the form of a tetrahedron.
2. having four lateral planes in addition to the top and bottom.
tet`ra•he′dral•ly, adv.
References in classic literature ?
We shall not try to give the reader an idea of that tetrahedral nose, that horseshoe mouth; that little left eye obstructed with a red, bushy, bristling eyebrow, while the right eye disappeared entirely beneath an enormous wart; of those teeth in disarray, broken here and there, like the embattled parapet of a fortress; of that callous lip, upon which one of these teeth encroached, like the tusk of an elephant; of that forked chin; and above all, of the expression spread over the whole; of that mixture of malice, amazement, and sadness.
A polyhedral mesh combines neighboring tetrahedral cells thus reducing element count and accelerating time to reach convergence.
The Molymod Shapes of Molecules Model is an educational aid designed for students with learning disabilities to teach them how to create eight models that feature examples of coordination numbers 1 to 6, including linear hydrogen chloride, linear beryllium chloride, bent water, trigonal planar, pyramidal ammonia, tetrahedral methane, trigonal bipyramidal and octahedral sulfur hexafluoride.
The need to address problems in three dimensional spaces motivated researchers to study subdivision schemes in those spaces because a 3D object is in general represented by a tetrahedral mesh on which its attributes are defined.
Main contractors construction works to replace the cable and mesh of the existing 1960s snowdon aviary whilst maintaining the original tetrahedral frame.
For the compositions under investigation, a value of Z=2.65-2.67 corresponding to x=25-27 at.% has been obtained as critical for a transition from 2D cross-linked chains arrangements to formation of 3D network of tetrahedral Ge[Se.sub.4] and pyramidal Ge[Se.sub.3] when the x value increases [5, 13].
Out of 54 spleens observed for the present study, 21 (38.88%) wedge, 12 (22.22%) triangular, 6 (11.11%) tetrahedral, 11 (20.37%) oval & 4 (7.40%) irregular shaped spleens were noted [Fig.
Results from tetrahedral and hexahedral meshing are compared for ped-pro and exterior load cases.
Most often they are meshed with tetrahedral elements of 2-3 mm edge length.
The AMBEO VR Mic is an Ambisonics microphone that uses four carefully selected, matched capsules in a tetrahedral arrangement.
There are two types of conventional vacancy trap sites in face-centered cubic cells: octahedral sites and tetrahedral sites.
The nature and number of coordinating ligands together with the overall coordination geometry of the system dictate the wavelengths and the intensities at which this absorption occurs [37, 38]: an intense band ([epsilon] > 300 [M.sup.-1] [cm.sup.-1]) at 625 [+ or -] 50 nm is diagnostic of a tetrahedral coordination and a weak band ([epsilon] [less than or equal to] 30 [M.sup.-1] [cm.sup.-1]) at 525 [+ or -] 50 nm reveals an octahedral complex.