Accretion disk is a roughly circular mass of diffuse material in orbit around a central object, such as a star or black hole.

Far below, eternities away, drifting and glowing, was a circular mass, and the heat it threw into my face was great.

It grows to 2 meters high, with a circular mass of 30-40 cm leaves.

The flat top forms the inhabited world, which is surrounded by a circular oceanic mass.

This time the jammer was so powerful as to turn the Russian-made screen into a circular mass of pure white.

This sticky substance hardens into a dark yellow circular bread-like mass which is fed to the cubs.

The solid circular mass was altering shape.

You see the one that's made up of two fairly circular masses, connected by an isthmus, that looks like a dumbbell?

An outer circular mass is attached to the hub by an integral rubber or other elastomeric section.

At its edge appeared a circular mass of greyish material whose composition no one would have ventured to guess.