The central disk of brittle stars can be three to eight inches in diameter.

He went to the central disk and placed the prize upon the pedestal.

The central disk actually consisted of three wide rings surrounding the shaft.

What about the lower part of our main shaft and our central disk?

As for the central disk, we'll have to completely replace the water in the ocean deck, of course.

It can be seen that most of the light is in the central disk.

The most distinct part of this pattern is a central, nearly white disk.

Some were larger than others, some smooth without the central black disks.

The central disk is divided into four equal parts.

The nervous system consists of a main nerve ring which runs around the central disk.