(n.) A plane figure having four angles, and consequently four sides; any figure having four angles.
(n.) A square or quadrangular space or inclosure, such a space or court surrounded by buildings, esp. such a court in a college or public school in England.
Example Sentences:
(1) zygapophysiales structurally represent a force locked, kinematically contrained four-bar-chain (link quadrangle).
(2) This investigation examined how subjects perceived and localized the centers of irregular quadrangles.
(3) Chile will attack during their last-16 match against Brazil in Belo Horizonte because not to do so would be to ignore their own most obvious asset, that supremely mobile midfield-into-attack quadrangle.
(4) Based on intraoperative TEE findings, corrective procedures included quadrangle resection posterior leaflet with Carpentier ring in four, chordal shortening and chordal transfer anterior leaflet in four, flexible Duran ring for annular dilatation in two, closure of all atrial septal defects (ASD) with pericardial patch in secundum and sinus venosis type (ligation of small anomalous vein in one), and Dacron patch in primum type, myomectomy for HOC and reconstruction of the tricuspid annulus with Duran ring in Ebstein's anomaly.
(5) Biomechanical analysis of the stomatognathic system yields that the linkage between posterior and anterior guidance can be modelled by a link quadrangle (throttle crank) with closed linkage.
(6) The vast quadrangle at the centre of a sprawling complex of ministerial offices in Delhi has become a rubbish dump for broken furniture, discarded water coolers, broken air conditioners, abandoned telephones and large bags of discarded paper.
(7) On the basis of some more specific findings, we suggest that it is not as much the number of correlation quadrangles that determines the saliency of a regularity as it is the degree to which they facilitate or "bootstrap" each other.
(8) Misjudgement of orientation is demonstrated in drawings of tilted quadrangles with parallel diagonals.
(9) The superior tumors are characterized by the angle between the 2nd 3rd SOV segments not exceeding 100 degrees and by the quadrangle surface of 419 mm2 in average.
(10) Quadrangles with parallel LS-axes were systematically judged as differently tilted according to the difference in the orientation of their axes of balance.
(11) The sale, to Quadrangle Capital Partners, marks a winding down of Dennis's decade-long publishing foray into the US, which started with the launch of Maxim in 1997.
(12) In 2007 Dennis Publishing sold its US magazine interests including Maxim, Stuff and Blender to private equity partners Quadrangle Capital Partners, who own Alpha Media , for a price reported at the time to be about $240m (£121m).
(13) On Saxon Square, a pristine quadrangle of shops and cafes at the northern edge of town, I meet Dee and Graham Snape, 68 and 71 respectively, having coffee in the sunshine.
(14) Gradually the dramatic triangle begins to emerge – or is it a quadrangle?
(15) This mechanism can approximately be replaced by a link quadrangle and mapped by a standard gear.
(16) In addition to the first-order regularities of orientational uniformity and midpoint collinearity (Jenkins, 1983), bilateral symmetry (BS) gives rise to second-order relations between two pairs of symmetric elements (represented by correlation quadrangles).
(17) Judgements were also influenced by the orientation of an 'axis of balance', which ran through the centre of gravity and the lowermost apex of the quadrangle.
(18) The federal government has authorized an additional 9m reais ($2.36m) to the mines ministry for an audit of dams in the so-called iron quadrangle, the heavily mined region in Minas Gerais where the Samarco mine operates.
(19) In well-functioning families, this tetrad or quadrangle is wide-spread in the first pair of siblings in the family and tends to be more common in same-sex pairs, suggesting that sibling deidentification is designed to mitigate the relatively intense sibling rivalry characteristic of these pairs and hence to maintain family harmony.
(20) The main characteristic determining estimated orientation of the quadrangles was the axis from which the sum of the squared distances to each point of the figure was minimal (the LS-axis).
Tetragon
Definition:
(n.) A plane figure having four sides and angles; a quadrangle, as a square, a rhombus, etc.
(n.) An aspect of two planets with regard to the earth when they are distant from each other ninety degrees, or the fourth of a circle.
Example Sentences:
(1) The crystals are tetragonal, with unit cell dimensions a = 48.9 A and c = 82.0 A, space group P 41 21 2 or P 43212.
(2) The morphological unit of the regular array appeared to consist of four spherical subunits, each about 2 nm in diameter, which were arranged in a tetragonal pattern about 4.5 by 7.0 nm in dimension.
(3) Two different tetragonal crystal forms have been characterized, both diffracting to about 6 A using synchrotron radiation.
(4) The outer structured layer was a linear array of particles overlying an inner tetragonal array of larger subunits.
(5) An activity assay of redissolved tetragonal form crystals indicates that the uncleaved, functional serpin has been crystallized.
(6) The A ring of the steroid in the tetragonal crystal was found to be disordered, and exists in both a normal and inverted conformation.
(7) One was in a hexagonal array, and the other was in a tetragonal array.
(8) The crystals are tetragonal rods with unit cell dimensions a = 128.6 A, c = 92.5 A.
(9) A hydrated cobalt ion is found to coordinate to two N7 atoms of adjacent guanines, forcing these two guanines to destack with a large dihedral angle (32 degrees), in the dimer of the tetragonal form.
(10) These tubules are clearly distinguishable by their shape and fine structure from the periodic structure of a P. rhodos cell wall layer, which exhibits a tetragonal pattern, and also from polyheads and polysheaths of defective bacteriophages.
(11) The structure crystallizes in the tetragonal space group P41 with a = 8.225 (5) and c = 28.42 (1) A.
(12) This truncated S-protein was exported via the periplasm to the cell surface, but could not self-assemble into a tetragonal array or be anchored to the cell surface.
(13) Bacillus sphaericus strain P-1 has previously been shown to have a tetragonally arrayed (T layer) protein which forms the outer layer of the cell wall.
(14) Its three-dimensional structure from two different crystal forms (tetragonal and trigonal) has been determined by X-ray diffraction analysis at 1 A resolution.
(15) Both crystal forms are tetragonal, the space group for form I is P4(1)22 (or P4(3)22), and that for form II is P4(2)22.
(16) Density variations suggest an arrangement of subunits, either tetragonal or trigonal, viewed from a variety of angles about the DNA axis.
(17) The binuclear copper site is characterized as two tetragonal Cu(II) atoms bridged by both an endogenous protein ligand and the exogenous ligand (i.e., peroxide), with the lack of an electron paramagnetic resonance signal being the result of antiferromagnetic exchange via the endogenous bridge.
(18) The crystals are tetragonal, show the symmetry of space group P4(1) or its enantiomer, have lattice constants of a = 58.46 (1) and c = 77.02 (3) A, and scatter to at least 2 A resolution.
(19) These elevations were distributed according to a tetragonal pattern with a periodicity of 850 A.
(20) Crystals are tetragonal, with space group P42(1)2, a = b = 171 A, c = 150 A in the absence of ATP; and P422, a = b = 101 A, c = 114.4 A in the presence of ATP.