Method of Determining the Position of the Symmetry Axis of a Crystal by means of X-Rays W. LINNIK 1 Nature volume 124 , page 946 ( 1929 ) Cite this article ...

Now we introduce symmetry by rearranging the field of Bistable Quartets to form a “butterfly” pattern, which is bilaterally symmetric across the vertical axis.

A symmetry of the laws means that when we observe phenomena from different points of view, ... being symmetric under rotation by any angle about an axis passing through the circle’s center and ...

Snowflakes, on the other hand, are symmetric under rotations (about an axis passing perpendicularly through their center) by 60 degrees (also by 120, 180, 240, 300, and 360 degrees).