(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.
Octahedron
Definition:
(n.) A solid bounded by eight faces. The regular octahedron is contained by eight equal equilateral triangles.
Example Sentences:
(1) The structure of the activated forms of CF1 can be described best as an intermediate between the dimeric arrangement of latent CF1 and an octahedron.
(2) Location and refinement of the two inequivalent H atoms permitted a detailed analysis of the hydrogen bonding, which occurs principally between the oxygen octahedron and the bromate groups.
(3) The room-temperature structure is very similar to that reported previously for a sample at 169 K. The water O atoms form a very slightly distorted octahedron about nickel while the perbromate-ion geometry is virtually regular tetrahedral.
(4) The central molybdenum atom adopts a distorted octahedral coordination geometry with one face of the octahedron occupied by the tridentate pyrazolylborate ligand and the opposite face by the oxo and the two phenolato ligands.
(5) The coordination environment of the Mg atom is a very nearly regular octahedron of water O atoms.
(6) The quaternary structure of the protein molecule is approximated by a model consisting of six spherical subunits situated at the vertices of an octahedron having the symmetry 32.
(7) The single type of Al ion is coordinated by six inequivalent water O atoms which form a slightly distorted octahedron.
(8) Scanning electron microscopy was employed to elucidate the structure of the crystals, which were found to exist as regular octahedrons ranging in size from 5 to 90 micrometers.
(9) The different spectral forms result from the extent of distortion of the MnIV octahedron.
(10) By computer calculation with the use of atom-atom potentials a stereochemical model of the DNA-hydrate Na+ complex was obtained according to which the Na+(H2O)6 octahedrons are localized in the narrow groove of DNA with formation of a great number of van der vaals contacts and hydrogen bonds.
(11) In the case of artificially produced conjugate containing six cross-linked CT molecules, this is observed at Wo = 43 when rc is equal to the radius of the sphere surrounding the absolute octahedron composed of six CT globules.
(12) In one simulation, one alpha-cyclodextrin form in a "truncated octahedron box" containing 611 water molecules is simulated over 90 picoseconds to mimic the solution structure.
(13) The average Al--O distance within the octahedron is 1.872 (11) A.