undissolved

From un- + dissolved.

undissolved (comparative more undissolved, superlative most undissolved)

1. Not dissolved.
   • 2001, Bob Ritter, “Chapter 4: Sustaining Aquatic Ecosystems”, in Science 10, Nelson Thomson Learning, page 157:

     In an attempt to compare the amount of undissolved solids at two different sites in a lake, the following procedure was followed at each site.