The meaning of Tetragonal

adjective

Of or denoting a crystal system or three-dimensional geometrical arrangement having three axes at right angles, two of them equal.

Usage examples:

Superb, equant tetragonal crystals occur on quartz in the junction pockets.

adjective

Of or relating to the shape of a crystal in which two of three axes of each crystal are of the same length and all three axes form right angles

Usage examples:

Some of the larger crystals are elongate, which gives them a tetragonal rather than cubic appearanc…