say it: di-ZAHL-vur
dissolver is a noun meaning "a liquid substance capable of dissolving other substances". It carries one recorded sense.
a liquid substance capable of dissolving other substances
“the solvent does not change its state in forming a solution”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for dissolver come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.