A correction fluid is an opaque, white fluid applied to paper to mask errors in text.

She took a clean test tube, poured in some of the clear water and then added two minute drops of the opaque fluid.

In the bottom were two or three inches of an opaque fluid.

Once, I thought I glimpsed shadowy figures moving within, like drifting clouds or huge living creatures swimming through an opaque fluid.

In medieval Islamic literature, cataracts were thought to have been caused by a membrane or opaque fluid that rested between the lens and the pupil.

Basically an opaque red fluid over ice cubes with some kind of greenery sticking out of it.

Negative staining is an established method, often used in diagnostic microscopy, for contrasting a thin specimen with an optically opaque fluid.

The dust clung to the windows, in vertical rivulets, sliding down the windows like little streams of opaque fluid.

Propofol emulsion is a highly opaque white fluid due to the scattering of light from the tiny ( 150 nm) oil droplets that it contains.

Electronic sensing can be used for opaque fluids.