The process of leaching WordNet 3.0 & Open English WordNet

Leaching is the process of a solute becoming detached or extracted from its carrier substance by way of a solvent. Wikipedia

The process of extracting substances from a solid by dissolving them in a liquid Wikipedia Disambiguation

Extraction of some soluble substances from a solid materials into a liquid Wikidata

1) The process of separating a liquid from a solid (as in waste liquid by percolation into the surrounding soil. 2) Extraction of soluble components of a solid mixture by percolating a solvent through it. 3) To lose or cause to lose soluble substances by the action of a percolating liquid. OmegaWiki

The process by which something is leached. Wiktionary

Process by which something is leached. Wiktionary (translation)