feldspathic

[ feld-spath-ik, fel-, feld-spath-, fel- ]

adjective

, Mineralogy.

1. of, relating to, or containing feldspar.

feldspathic

/ fĕld-spăth′ĭk,fĕl- /

1. Relating to or containing feldspar.

Other Words From

• nonfeld·spathic adjective

Word History and Origins

Origin of feldspathic¹

1825–35; < German Feldspath ( feldspar ) + -ic

Example Sentences

At many places also gray feldspathic sandstones and basal conglomerates appear.

From Project Gutenberg

One of these, a mass of red feldspathic granite, is twenty-five feet thick and fifty feet long.

From Project Gutenberg

Both substances, the infusible and the fusible, are productions of the same geological formation,—decomposed feldspathic rock.

From Project Gutenberg

Sienite and feldspar succeeded in our descent to the snow line, where we found a feldspathic granite.

From Project Gutenberg

It occurs in the various feldspars and feldspathic rocks, and in mica.

From Project Gutenberg