LIXIVIUM is validvalid

a solution obtained by leaching [n LIXIVIA, LIXIVIUMS] : LIXIVIAL [adj]

72,619 of 196,601 in NWL2023·also valid in CSW24

(Latin) a solution of alkaline salts extracted from wood ashes; hence, any solution obtained by lixiviation [n LIXIVIA or LIXIVIUMS]