The process of evaporation of the solvent from an aerosol of fine droplets (the droplets being the result of nebulizing a solution). Desolvation converts the aerosol into a dry aerosol consisting of a suspension of solid or molten particles of the solute.
Source:
Orange Book, 2nd ed., p. 165 (https://media.iupac.org/publications/analytical_compendium/)