feldspathoid
Noun

feldspathoid

  1. (mineralogy) Any of a small group of igneous, plutonic, and volcanic minerals formed in magma that did not contain enough silica to satisfy all the chemical bonds. Feldspathoids are silica-poor variants of the feldspar group.
Adjective

feldspathoid (not comparable)

  1. (mineralogy) Resembling a feldspar.



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