Near the centre of that bloated red disc was a small, dark shadow, perfectly circular.

The first thing Simon saw was a great circular shadow, and for a long time he saw nothing else.

He clung to the wheel, willing its circular shadow to stay before his mind's eye.

Johnny pushed past him blindly and began to flounder toward the bandstand, a big circular shadow up ahead.

But what shocked me was the black circular shadow upon his left temple.

In the sea of smoke there were circular shadows, each big enough to cover a thousand Rafts.

Nestling there was a black shadow, circular and insubstantial.

There was a deep, circular shadow now at the centre of the sun, a dark spot, like the pupil of a golden eye.

The earth throws a circular shadow on the moon during a lunar eclipse.

It is common to see the larger moons casting circular shadows upon Jupiter's cloudtops.