| The structure of an amphibole is a double chain of silicate tetrahedral which makes it very strong and durable. |
| In designing aircraft his use of tetrahedral structural elements inspired him to develop and patent a system of space frame architecture. |
| The spongy fabric is loose and tetrahedral, with rather irregular pores in size and shape. |
| Each hemoglobin molecule is made up of four heme groups surrounding a globin group, forming a tetrahedral structure. |
| One was designed to form a cage-like structure with tetrahedral symmetry, consisting of 12 subunits. |
| The researchers poured tetrahedral dice into containers which they shook until completely full. |
