tetrahedrons Definition

polyhedra, pentagons, icosahedral, dodecahedron, hexagons, equilateral triangle, quasicrystal, ellipsoids, parallelograms, rectangles, cubes, lattices, toroid, semicircles, isosceles triangle, octagons, cuboid, nucleon, triangular prism, hyperbolic geometry, atoms, hadrons, geometry, helices, triangles, dowels, micrometre, unstack, dipoles, symmetries, rhombus, tinkertoy, crystal lattice, icosahedron, spherical geometry, corrugation, fibril, ellipse, planetoids, nuclei, crosspieces, armillary sphere, protractor, covalent bond, diffraction grating, hypercube, eggbeaters, octahedron, vertices, spheroid, spicule, torus, cantilevers, trapezoids, differential calculus, spectroscope, planetesimal, baseplate, chondrules, infinities, crystals, shapes, hydrophobicity, supramolecular, spinneret, magnetisation, thermoform, embroidery hoop, parabolic reflector, flagella, retroreflector, orbitals, groundsheet, peapod, conic, gravitons, curvatures, bilayer, gimbals, toroidal, filaments, morphologies, bilaterally symmetrical, momenta, dipole moment, gaussian, lamellae, bosons, spherules, magnetic monopole, mandrels, stilbene, pegboard, calorimeter, origami, macromolecule, vortices, pearlite, azobenzene, schrodinger equation,