adj. (of two or more liquids) that are not mutually soluble; unmixable
the GNU version of the Collaborative International Dictionary of English
adj. Not capable of being mixed or mingled.
adj. Not miscible; forming two distinct phases when mixed at some concentration; -- of two liquids.
The Century Dictionary and Cyclopedia
Not miscible; incapable of being or becoming mixed, as oil and water.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. (chemistry, physics) incapable of mixing
Word Usage
"There are days when I think that the two entities or disciplines are entirely immiscible and antagonistic, and others where they seem not just to complement each other but to be, in a strange way, twin enterprises."