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The Collaborative International Dictionary
Lixiviating

Lixiviate \Lix*iv"i*ate\, v. t. [imp. & p. p. Lixiviated; p. pr. & vb. n. Lixiviating.] To subject to a washing process for the purpose of separating soluble material from that which is insoluble; to leach, as ashes, for the purpose of extracting the alkaline substances.

Wiktionary
lixiviating

vb. (present participle of lixiviate English)