The Collaborative International Dictionary of English v.0.48:

Lixiviate \Lix*iv"i*ate\, Lixivited \Lix*iv"i*`ted\, a. [From
   Lixivium.]
   1. Of or pertaining to lye or lixivium; of the quality of
      alkaline salts.
      [1913 Webster]

   2. Impregnated with salts from wood ashes. --Boyle.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]