What it is A pocket of raised skin filled with fluid.

Of course we filled the radiator back up with fluid.

Then the knee filled with fluid and had to be drained twice.

He's unable to swallow, and his lungs are filling with fluid.

In hemihydranencephaly, only half of the brain is filled with fluid.

Cancer cells may also be found in an area between the lungs and the chest wall that has filled with fluid.

I'm 20 years old and I have pimples on my cheeks filled with fluid.

This work included his discovery that the inner ear was filled with fluid.

As a potential space, the recess is not filled with fluid under normal conditions.

Your pimples become large and hard or filled with fluid.