Related by context. Frequent words. (Click for all words.) 54 spherical 53 radial 52 hexagonal 52 annular 52 concentric circles 52 concave 51 helical 50 symmetrical 50 symmetric 50 hexagon 50 curvilinear 50 geometric 49 geometrical 49 ellipse 49 interlocking 48 trapezoidal 48 radii 48 lattice 47 axial 47 helix 47 transverse 47 evenly spaced 47 rectangle 47 convex 47 rectangular 47 triangles 47 orthogonal 47 conical 46 pyramidal 46 elliptical 46 beveled 46 wedge shaped 46 triangle 46 unidirectional 46 armature 46 chevron 45 rectangles 45 symmetrically 45 longitudinal 45 curved 45 capillary 45 perpendicular 45 diameters 44 ridged 44 circular 44 dorsal 44 topology 44 elongated 44 horizontal 44 linear 43 outer 43 donut shaped 43 triangular shaped 43 asymmetrical 43 protrusions 43 geometry 43 contour 43 ventral 43 torsion 43 counterclockwise 43 matrix 43 ellipses 43 cylindrical 42 zigzags 42 closely spaced 42 spindle 42 columnar 42 geometric shapes 42 arcs 42 magnetization 41 flanges 41 horizontally 41 geometrically 41 distal 41 trapezoid 41 starburst 41 angular 41 semicircular 41 curving 41 diameter 41 contoured 41 coil 41 Fig. 40 vortices 40 scalloped 40 encircles 40 polygonal 40 encircling 40 vertical axis 40 omni directional 40 oblong 40 alignment 40 bushing 40 vertebral 40 vertically 40 atria 40 planar 40 resonator 40 curvature 40 pinwheel 40 microtubules