(n.) A plane figure having many angles, and consequently many sides; esp., one whose perimeter consists of more than four sides; any figure having many angles.
Example Sentences:
(1) Gap junctions were of different sizes and frequently composed of a small number of connexons organized in polygonal aggregates or linear arrays.
(2) The isolated outer sheath was observed as a triple-layered, closed vesicle carrying a polygonal array by electron microscopy.
(3) Electron microscopically, the tumor cell nuclei were oval or polygonal and sometimes slightly invaginated, with a few prominent nucleoli.
(4) Delimitation of the pathological process in the lung is characterized by an increase in the number of T- and B-lymphocytes and considerable predominance of polygonally shaped cells with cytoplasmic outgrowths of different lengths and their subsequent replacement by a cell form transitory between T- and B-lymphocytes.
(5) At day 12-15, some nodules consisting of polygonal cells were formed in all culture conditions, and these nodules were mineralized 2-3 days later.
(6) The majority of the choline acetyltransferase-immunoreactive neurons had fusiform, oval, or polygonal somata with somatic diameters greater than 20 microns and contained deeply invaginated nuclei surrounded by copious cytoplasm.
(7) One type of cells had polygonal morphology, showed density-dependent contact inhibition at confluence in vitro, showed lectin-binding characteristics of endothelium (but only moderate positivity for factor VIII antigen), demonstrated induction of gamma-glutamyl transpeptidase when exposed to astrocyte-conditioned media, and responded to insulin by a pronounced increase in DNA synthesis.
(8) The first type included large multipolar neurons with triangular or polygonal perikarya and typically 3-5 dendrites emerging from the poles of each cell.
(9) Type II neurons had multipolar or polygonal cell bodies, which measured an average 31 micrometer by 43 micrometer and emitted four to seven primary dendrites.
(10) "En face" views of the epithelial cells showed capping protein distributed in a polygonal pattern coincident with cell boundaries in intestinal epithelium, sensory epithelium of the cochlea, and the pigmented epithelium of the retina and at regions of cell-cell contact between chick embryo kidney cells in culture.
(11) Polygonal, foamy macrophages were found in 12 cases.
(12) The subcultured HNC and ADPKD cells retained characteristic epithelial polygonal and elongated shape and positive immunofluorescent staining for cytokeratin.
(13) The slightly prominent apices of the superficial epithelial cells are more or less polygonal in shape and covered with short microvilli among which small granules as possible morphological expression of a secretory activity are detectable.
(14) Initially, they grew as individual polygonal cells, tending to form tight confluent monolayers with poorly defined intercellular boundaries.
(15) A 3rd type displayed a polygonal outline and increased cytoplasm.
(16) While the arteries show a long stretched spinle or lancet like form they change over blunt, oval, triangular or rhomboid forms into polygonal cells with spiked border lines at the venules.
(17) Also PMA was found to cause a profound change in astrocyte morphology; cells were converted from flat, polygonal, undifferentiated cells to process-bearing cells.
(18) On these substrata, cultured astrocytes changed their shape from flat and polygonal to stellate in the absence of hormones or growth factor supplements.
(19) The cells have a spindle, round or polygonal shape with neoplastic and pleomorphic features that grew in multilayers without contact inhibition.
(20) The rate constant for clearance as described in the paper represents a non-invasive method for rapid evaluation of the uptake capacity of the liver and, in particular, with regard to the polygonal cells of the liver parenchyma when IDA derivatives are employed.
Polyhedron
Definition:
(n.) A body or solid contained by many sides or planes.
(n.) A polyscope, or multiplying glass.
Example Sentences:
(1) These viruses are short-tailed polyhedrons resembling the SpV3 virus of Spiroplasma citri, and all have been shown to lyse at least one other strain of SRO.
(2) In the intact and elastase-treated cages, the clathrin extends from the vertices into the interior of the polyhedron and forms an inner shell of material.
(3) These observations were compared with the possible combinations of polygonal sections through various polyhedral models proposed by other workers and the five classical regular polyhedrons.
(4) The Voronoi polyhedron of a given S-phase cell nucleus is that polyhedron of minimal volume defined by planes all of which are perpendicular bisectors of the vectors extending from the given cell to all other S-phase cells in the tumor.
(5) The co-ordination polyhedron displays approximate 4m2 symmetry.
(6) A minimal data structure of the polyhedron is then proposed, which contains only topological informations, since no coordinates have been generated.
(7) We hypothesize that this distinct 9S form represents a major oligomeric subunit involved in assembly and disassembly of clathrin polyhedron coats in the living cell.
(8) Bioassays of the two pure virus variants in M. brassicae larvae have shown the LD50 values to be 4610 polyhedron inclusion bodies (pibs) for PfMNPV(A) and 5937 pibs for PfMNPV(B).
(9) Electron micrographs suggest that the eight subunits form a polyhedron of point symmetry D4, or 42.
(10) A suitable composition for the residual glass phase of bioactive glass-ceramics can be found approximately and controlled on the basis of calculation of a structural parameter Y, which in the simplified concept of the glass structure corresponds to the mean number of bridging oxygens per polyhedron in the glass lattice.
(11) The direct assay using 125I-labeled rabbit immunoglobulins could detect 0.2 microng of polyhedron protein, and the indirect method using 125I-labeled sheep antirabbit immunoglobulins could detect 0.05 microng of polyhedron protein.
(12) Morphologically, the virus is a rectilinear polyhedron 270 A in diameter, without a process.
(13) The biological function of zinc is governed by the composition of its tetrahedral coordination polyhedron in the metalloprotein, and each ligand group that coordinates to the metal ion does so with a well-defined stereochemical preference.
(14) Successive calvarial and craniofacial polyhedron expansion, as well as weight, showed considerable variability and interindividual variation throughout the observation period.
(15) A complementary DNA that encodes a bovine brain, calmodulin-sensitive (type I) adenylylcyclase has been inserted into the baculovirus genome under the control of the strong polyhedron promoter.
(16) The head of phi25 is a regular polyhedron measuring 75 nm in diameter.
(17) RV volume was calculated from the polyhedron created by the markers by decomposing the polyhedron into 24 tetrahedrons, each of whose volumes could be solved from the xyz-coordinates of markers.
(18) for the optimum approximation of experimentally obtained values of the output signal, the method of the changeable polyhedron was applied belonging to the optimalization numerical methods used in the regulation technics.
(19) The coordination polyhedron of catalytic zinc is usually dominated by histidine side chains.
(20) The weak NO3- inhibitor does not displace Wat263 from the metal coordination but occupies a fifth binding site changing the zinc coordination polyhedron into a slightly distorted trigonal bipyramid.