| Answer | Crossword Clue |
|---|---|
| biaxial | having or relating to two axes or optic axes a biaxial crystal |
| monoclinic | Of or denoting a crystal system or three-dimensional geometric arrangement having three unequal axes of which one is at right angles to the other two |
| tetragonal | Of or denoting a crystal system or three-dimensional geometric arrangement having three axes at right angles, two of them equal |
