Related by context. Frequent words. (Click for all words.) 54 hexagons 54 perfectly symmetrical 51 hexagonal 51 hexagon 50 triangles 49 spherical 49 evenly spaced 48 ellipse 47 geometric shapes 47 whorls 47 concentric circles 47 ovoid 47 geometrical 47 geometric 47 concentric rings 47 rectangles 46 stamens 46 lattice 46 vertices 45 pentagon 45 diagonals 45 inverted 45 incised 45 geometric pattern 45 globular 45 lobed 45 octagonal 44 helices 44 alternating layers 44 geometric forms 44 symmetrical 44 morphologies 44 rectangular 44 calcite 44 crystal lattice 44 curvilinear 44 polychrome 44 rectangle 43 parabolas 43 micron sized 43 triangular shaped 43 nanoscopic 43 z = 43 photonic crystal 43 lattices 43 dimensional 43 torus 43 oblong 43 fractal 43 opalescent 43 checkerboard pattern 42 concentric 42 Fig. 42 anisotropic 42 horizontal 42 nanometers thick 42 convex 42 crystalline 42 gridded 42 dimer 42 mandalas 42 symmetries 42 rectilinear 41 chevron 41 dimers 41 pyramidal 41 chevrons 41 varying heights 41 perpendicular 41 vertical axis 41 semiconducting 41 inlaid 41 nucleotides 41 symmetrically 41 hieroglyphs 41 fermions 41 polished granite 41 silvered 41 intricately detailed 40 petals 40 graphitic 40 spherical shape 40 prisms 40 geometric patterns 40 enamelled 40 fullerene 40 correlation coefficient 40 appliquéd 40 orthogonal 40 parabola 40 shapes 40 numeral 40 superfluid 40 indentations 40 conductance 40 cigar shaped 40 perpendicularly 40 rectangular shaped 40 waveguides 40 nacre 40 μm