(n.) A plane figure of eight sides and eight angles.
(n.) Any structure (as a fortification) or place with eight sides or angles.
Example Sentences:
(1) Comprised of four octagonal half strain rings, the strain gage dynamometer measures the three moment load components at the boot.
(2) Holding it with both hands they howl into the octagon.
(3) On a platform level with the octagonal cage in which the fighters would assault each other, was a row of gilded sofas, scattered with red cushions, which still lacked occupants.
(4) Outside of the octagon, Bisping possesses the demeanour of an oversized Ricky Hatton - all mischievous grins, wisecracks and gentle ribbing of his sparring partners.
(5) At the divisional courthouse, a palatial complex of octagonal towers and Florentine domes originally built as the accounting office of British Burma, the windows have blown out and vegetation sprouts from every nook, yet inside the decaying shell, the courts continue to press on.
(6) Three groups of rats were required to locate a single water bottle from an octagonal array of eight otherwise empty bottles.
(7) The task in the 8-choice arena was to locate a single water bottle from an octagonal array of eight otherwise empty bottles.
(8) Modest in size, the Casa de Mar makes for a cool, peaceful perch from which to look out onto the octagonal bell tower and beyond to the aptly named Golfo Paradiso.
(9) At a special meeting convened at Bear's 45-floor octagonal midtown office tower, investors nodded through a sale of the cash-strapped company to its rival JP Morgan at a knockdown price of about $1.4bn (£700m).
(10) Because, Fertitta says, here’s the thing: “What we have is this incredible thing where you take two athletes, at the top of their game, in the most incredible shape and you put them in the Octagon and you let them use any martial art they want to compete.
(11) Whereas segments of hexagonal rods in the section should project as octagons at the electron microscope imaging plane, and octagonal profiles are never found, rectangular or rhombohedral rod segments project as hexagons.
(12) Remove the peel from each slice by cutting around the fruit in straight lines to make hexagonal or octagonal slices.
(13) There are remnants of what was once a temple at Nettleton Shrub in Wiltshire – a large octagonal building perhaps in honour of Apollo.
(14) Outside the Octagon, Zuffa doesn’t just regulate, it overregulates.
(15) The following images were seen: 1) elongated hexagons with sharp outlines, maximal density, and minimal size (type A profile); 2) elongated hexagons with one pair of long sides of high contrast, two pairs of short sides of low contrast, high density in the center of the image, and low density towards the low contrast sides (type B profile); 3) slanted hexagons with one pair of high contrast sides, two pairs of low contrast sides (one pair of long, one pair of short sides), and the density decreasing from the center towards the low contrast sides (type C profile); this profile was seen more frequently than the type B profile; and 4) octagons with low contrast edges all around, the density decreasing from the center towards the edges (type D profile).
(16) The dendritic apex is octagonally shaped in transverse section, its inner membrane lined by a laminated structure reminiscent of the noctuoid tympanal organ 'collar'.
(17) Before it started, the security guards closed in around the Octagon.
(18) These optimal conditions have been confirmed with an octagonal design experiment.
(19) Contraindications are cases of wide apical foramina and oval or octagonal root canal cross sections.
(20) Together with a gilded octagonal ceiling painting by the Baroque master Domenichino , they give the basilica a memorable glow.
Octahedral
Definition:
(a.) Having eight faces or sides; of, pertaining to, or formed in, octahedrons; as, octahedral cleavage.
Example Sentences:
(1) As a prerequisite for preparing bispecific antibody conjugates containing anti-tumor and anti-metal chelate binding sites that can be used for pretargeted immunoscintigraphy, monoclonal antibodies (Mabs) have been raised against an octahedral metal chelate synthetized from gallium (Ga) and the hexadentate ligand N,N'bis[2-hydroxy 5-(ethylene beta carboxy) benzyl] ethylenediamine N,N' diacetic acid (Ga-HBED-CC).
(2) Circular dichroic (CD) and magnetic CD spectra indicate that the first Co2+ binding site is tetrahedral-like and that the second is octahedral-like.
(3) The bonding sites are ascertained, and the complexes were all six-coordinate assuming a distorted octahedral geometry.
(4) The electronic spectra confirms the octahedral structure of the complexes.
(5) Ca1 is in near-ideal pentagonal bipyramidal configuration with Asp200 carboxylate and Pro175 peptide C = O in an apical, and Val177 peptide C = O and four water molecules in an equatorial position, whereas Ca2 displays incomplete octahedral coordination with the carboxylate of Asp260, the peptide C = O of Val16 and the two water molecules.
(6) This change in protein conformation both exposes a cryptic protein pocket on each subunit to which phenol binds and forces the HisB10 zinc sites to undergo a change in coordination geometry from octahedral to tetrahedral [Derewenda, U., Derewenda, Z., Dodson, E. J., Dodson, G. G., Reynolds, C. D., Smith, G. D., Sparks, C., & Swensen, D. (1989) Nature 338, 593-596].
(7) Metal site 1 is four-coordinated and tetrahedral in the absence of substrate and is six-coordinated and octahedral in its presence; the O2 and O4 atoms of linear inhibitors and substrate bind to metal 1.
(8) The structural study reveals an asymmetric pseudo-octahedral N3O3 metal coordination sphere with meridional stereochemistry.
(9) The enzyme was crystallized to single octahedral bipyramids with sizes up to 500 x 200 x 150 microns 3.
(10) The X-ray structure of staphylococcal nuclease suggests octahedral coordination of the essential Ca2+, with Asp-21, Asp-40, and Thr-41 of the enzyme providing three of the six ligands [Cotton, F. A., Hazen, E. E., Jr., & Legg, M. J.
(11) An X-ray study of the crystal structure of a cobalt(II) complex with uridine 5'-monophosphate shows it to contain polymeric chains of composition [Co2(H2O)4 (5'-UMP)2]n. The cobalt atoms do not bind to the pyrimidine base moiety; instead each metal atom is octahedrally coordinated to four phosphate groups and two water molecules.
(12) Furthermore, we sought to clarify how these experimental results relate to our theory for skeletal morphogenesis which postulates that endochondral ossification is accelerated in regions of octahedral shear (deviatoric) stress and inhibited in areas of compressive hydrostatic (dilatational) stress.
(13) Each of the two inequivalent copper ions is coordinated by six water-molecule O atoms in a significantly distorted octahedral arrangement.
(14) Addition of magnesium changes the spectral characteristics of the apoenzyme reconstituted with 2 g-atom of cobalt from predominantly octahedral to 4- or 5-coordinate geometry.
(15) The coordination geometry at the ruthenium atom is distorted octahedral.
(16) Each Ru ion is coordinated in a distorted octahedral fashion by five ammonia molecules and a chloride ion.
(17) The geometry is difficult to classify but might best be described as distorted octahedral.
(18) The glycyl carbonyls from each of the peptides are octahedrally coordinated to the cation with an average calcium oxygen coordination distance of 2.26A.
(19) On the basis of these studies, a highly distorted, high-spin, chloro-bridged, polymeric octahedral structure for [Mn(N-N-S)Cl2]; a distorted, low-spin, monomeric octahedral structure for [Fe(N-N-S)2]; a distorted, high-spin, octahedral structure for [Ni(N-N-S)2]; and a square-planar structure for [M(N-N-S)X] (M = Ni, Cu, Pt or Zn and X = Cl- or -OAc) are suggested.
(20) Mass measurements from cryoelectron micrographs and image analysis of negatively stained specimens established that a distinctive 320-A-diameter particle consists of 24 close-packed pentamers arranged with octahedral symmetry.