Feldspathoid Definition
fĕld-spăthoid, fĕl-
noun
Any of a group of relatively rare minerals that are chemically very similar to feldspars, but have too little silica to qualify as feldspars.
American Heritage
Other Word Forms of Feldspathoid
Noun
Singular:
feldspathoid
Plural:
feldspathoidsOrigin of Feldspathoid
-
feldspath (obsolete variant of feldspar) (from obsolete German Feldspath feldspar feldspar) –oid
From American Heritage Dictionary of the English Language, 5th Edition
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