adj, noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   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. countable, uncountable

Adjective

1. 1
   Resembling a feldspar. not-comparable

Etymology

From German Feldspath (“feldspar”) + -oid.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.