It's a little sphere on which light falls from all around, in three dimensions.
And look at the way those little spheres are nested one inside the other!
I didn't know or care what was beyond my little sphere.
They shot a little sphere into the back of her neck and she died.
Then the little sphere shattered on the stone at his feet.
He held out a container full of little brown spheres.
We may run into some more of those little spheres, though, and I don't like the prospect.
Each servant, moving in and out, covered a little sphere of his own.
It had a little light sphere on it and would tell them whether anyone was standing outside.
He took the little sphere in both hands and twisted it slightly.