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

adjective Mineralogy.

of, relating to, or containing feldspar.

Also felspathic, feld·spath·ose, felspathose.

Origin of feldspathic

1825–35; < German Feldspath (see feldspar) + -ic
Related formsnon·feld·spath·ic, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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[fĕld-spăthĭk, fĕl-]

Relating to or containing feldspar.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.