lixivial

CIDE DICTIONARY

lixivial, a. [L. lixivius, fr. lix ashes, lye ashes, lye: cf. F. lixiviel.].

Impregnated with, or consisting of, alkaline salts extracted from wood ashes; impregnated with a salt or salts like a lixivium. [1913 Webster]
Of the color of lye; resembling lye. [1913 Webster]
Having the qualities of alkaline salts extracted from wood ashes. [1913 Webster]

Lixivial salts (Old Chem.), salts which are obtained by passing water through ashes, or by pouring it on them.