[te-trag-uh-nl] 
| 1. | pertaining to or having the form of a tetragon. |
| 2. | Crystallography. noting or pertaining to a system of crystallization in which all three axes are at right angles to one another, two being equal in length and the third being of a different length. |
| tet·ra·gon (tět'rə-gŏn') n. A four-sided polygon; a quadrilateral. [Late Latin tetragōnum, from Greek tetragōnon : tetra-, tetra- + -gōnon, -gon.] te·trag'o·nal (tě-trāg'ə-nəl) adj., te·trag'o·nal·ly adv. |
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