feldspathoid
noun
feld·spath·oid
\-ˌthȯid\
Definition of feldspathoid
-s
: a mineral consisting of an aluminous silicate (as leucite nepheline) that has too little silica to form feldspar
feldspathoidal
adjectiveFrom the M-W Editors
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Origin and Etymology of feldspathoid
International Scientific Vocabulary feldspath + -oid
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