Related by context. Frequent words. (Click for all words.) 66 concentric circles 59 concentric 56 ellipse 53 whorls 53 spherical 52 hexagons 51 hexagonal 51 evenly spaced 51 rectangle 50 hexagon 50 torus 50 rectangles 50 waveguides 49 lattice 49 hemispherical 49 geometric pattern 49 triangles 49 filaments 49 outer rim 49 alternating layers 49 funnel shaped 48 rectangular 48 conical 48 prisms 48 crescents 47 convex 47 petals 47 layers 47 encircling 47 irregularly shaped 47 stamens 47 lobes 47 geometric shapes 46 calcite 46 checkerboard pattern 46 lattices 46 teardrop shaped 46 geometrical 46 nebulae 46 crescent shaped 46 triangle shaped 46 cylindrical 46 diameter 46 outer 46 blobs 45 oblong 45 pinholes 45 crescent 45 encircles 45 globular 45 micrometres 45 varying heights 45 semicircular 45 quadrants 45 mosaic 45 cone shaped 45 pyramidal 44 saucer shaped 44 vertices 44 halos 44 petal 44 anisotropic 44 domes 44 spacetime 44 outermost 44 latticed 44 ridges 44 nebula 44 diagonals 44 annular 44 geometric 44 curvilinear 44 granite stones 44 dimensional 44 outer edges 44 ecliptic 43 ejecta 43 radii 43 teardrops 43 symmetrically 43 donut shaped 43 circular 43 striations 43 circumference 43 DNA strands 43 encircle 43 geometric patterns 43 interlocking 43 microstructures 43 chevron 43 moons 43 concave 43 protrusions 43 filament 42 elliptical galaxies 42 layered 42 rectangular shaped 42 decoratively 42 strands 42 blinking lights 42 spacings