Jonah:

There is in fact a family of nouns used in physics to refer to one state of matter imbedded as tiny particles in another state of matter.

For solid-in-gas, for example, it’s a “smoke,” for gas in liquid, a “foam,” for solid in liquid, it’s a “colloid.” The two states can be the same: teeny particles of one liquid imbedded in another liquid (one with which, obviously, it will not mix) is called an “emulsion,”

and so on. Neat, huh?