The device was quite small, and also covered in some kind of viscous substance that Kate decided she didn't want to examine too closely.

A viscous substance called formation aid is added to the vat with the fiber and water.

The name is also given to other adhesive or viscous substances.

He was moving his limbs, encumbered with some viscous substance.

Occasionally it would say, "Pt," like some viscous substance coming to a boil.

Out of it a black, viscous substance had begun to leak.

They have turned vast stretches of the desert sand into a viscous substance.

It's already sliding as a viscous substance does, reluctantly.

A spurt of a black and viscous substance smelling like gasoline came from the deep.

There was certainly some viscous substance on the steel-dark tip.