Three mottled gray disks sat near the middle of the field.

He lifted a gray disk that exactly fitted the description Darius had given.

And then a bright light flared on the leading edge of the little gray disk.

"You, David Hero: stand on the gray disk, beneath the wheel of globes."

Odo turned to look at the viewer again to locate the small and indistinct gray disk that was the station's starship.

The object that lay in the detective's palm was a dull gray disk that bore a Chinese character.

The sun was a dim, gray disk above the horizon when he'd gotten set up properly.

The irises were translucent gray disks fixed in a stare.

The G3 sun was a wide gray disk, darkening almost to black at the center.

"Don't ask me what they are," Heineman said, peering through the windscreen at the gray disks.