spherical aberration

But as the report pointed out time and time again, that dark era of violence in America was not some aberration.

When it is new, and also when in its waning stages it is visible in the daytime, the spherical form is very apparent.

We may note that in a few months of heavy weather the stones of such a fall have all been reduced to rudely spherical forms.

These bits are commonly distinctly faceted; they rarely have a spherical form.

Upon these spherical aggregations of the clouds the winds act in extremely varied ways.

He was crouching, the spherical plastic object in his right hand, his thumb over the button, when the field collapsed.