What does undissolved mean?
Undissolved is an adjective meaning that a substance has not dissolved or melted. It most often describes material that remains visibly separate, as with salt crystals at the bottom of a glass, tablets that have not completely disintegrated, or residue left inside a pipe. In scientific and technical writing, the term identifies a substance that has not become uniformly dispersed through a solvent. It may also describe a solid that has retained its original physical form rather than liquefying. The word is related in meaning to intact and unmelted, but it is more specific because it directly concerns the process of dissolution. Confusion is possible with dissolvable, which means capable of dissolving rather than currently remaining undissolved. Undissolved is useful when the distinction between a dissolved substance and one still present as a separate phase needs to be made clearly and precisely.
adjectiveNot dissolved or melted; remaining as a separate solid or substance rather than becoming part of a solution.
- Not dissolved or melted; still present as a separate solid or substance.
"Undissolved crystals remained at the bottom of the glass."
"The undissolved salt remained visible at the bottom of the glass."
"A layer of undissolved residue formed inside the pipe."
An undissolved substance has not vanished into a solution—it remains, in a sense, itself.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does undissolved come from?
The English adjective was formed by adding the negating prefix un- to dissolved, with the prefix indicating that the process of dissolution has not occurred. Dissolved comes from Latin dissolvere, formed from dis- and solvere, meaning “to loosen” or “to solve.” Related English words such as resolve, solution, and solvent share this Latin root.
How undissolved is actually used
Most often used in technical or formal contexts, including chemistry, pharmacy, food preparation, and materials science. It describes the substance’s current condition rather than its inherent ability or inability to dissolve.
Easily confused with undissolved
Undissolved means that something has not dissolved, whereas dissolvable describes something capable of dissolving.