The ability of a segment of a glass sphere to magnify whatever is placed before it was known around the year 1000, when the spherical segment was called a reading stone,[…]. Scribes, illuminators, and scholars held such stones directly over manuscript pages as an aid in seeing what was being written, drawn, or read.

The ball pinged off the wall and came hurtling back.

This has no holding, To swear by him whom I protest to love That I will work against him.

a gappy row of teeth