a. [f. fel(d)spath (see prec.) + -IC.] Of the nature of or containing feldspar.
1832. Lyell, Princ. Geol., II. 295. The decomposition of felspathic lavas.
1845. Darwin, Voy. Nat., xxi. (1873), 486. Feldspathic rocks have produced a clayey soil.
1879. J. J. Young, Ceram. Art, 56. Artificial porcelain may be made from alkaline clay, calcareous clay, or felspathic clay.
