Cancer is found in fluid around the lungs or the heart.

The dark shape settled in the fluid, no longer moving.

In real fluids, molecules do not go very far before running into each other.

I mean it was as if the bed had been dipped in dark fluid.

All you have to do is put in a new fluid.

The rest is throughout the body in blood, muscle and the fluid between cells.

Still, the talks were said to be in a fluid and delicate state.

The deeper you go in a fluid, the greater the pressure (force per area).

It also is used to determine how the particles will move in the fluid.

They moved slowly, as if swimming in a thick fluid.