She is an undulating mass of emotions, and he is a cold, unfeeling intellect.

Here and there pinnacles of vapour towered upwards from the undulating mass, as if trying to break free from it, and caught the morning sun.

False dawn had paled the sky just enough to define the hills below it as an undulating mass that seemed much closer than it was.

The seething avalanche of spiders flowed after him in a single undulating mass, covering walls and floor and ceiling, gaining on him with every heartbeat.

The long breathing gill flowered at an angle now, an undulating mass of fine fibers.

Black streams of nanoprobes snaked through the Founder's undulating mass of metaplasm.

Don surfaced about fifty yards away - and the sea behind him became covered with an undulating mass of jelly, twisting and rolling on the waves.

Mostly it looked like a huge, undulating mass of fur, skin, and taloned feet that were almost birdlike.

No one saw the undulating mass of squirrels break apart and run for the wooded sections of the park.

From the midsection of the pulpy, undulating mass came six evenly spaced tentacles, each broad and powerful-looking, covered with thousands of tiny suckers.