Feldspathoid

Alternative forms

• foid

Origin

Feld, field (from Middle High German veld, from Old High German feld) + Spath, spar + Oid, like or resembling.

Full definition of feldspathoid

Noun

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.

Related terms

• feldspathoidal

Adjective

1. (mineralogy) Resembling a feldspar.