tetrahedron [n.]
| sing. | tetrahedron | 
| plur. | tetrahedra / tetrahedrons | 
Outras palavras (mesmo modelo) :
philodendron octahedron millimicron enneahedron polyhedron hexahedron amnion Arthus phenomenon phenomenon mesoscopic phenomenon Wonderland phenomenon trapezohedron eidolon linguistic phenomenon properispomenon all-or-nothing phenomenon propylon Gasserian ganglion thalamencephalon hextetrahedron ... (56 words)