We found 2 dictionaries that define the word subfeldspathic:

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1. subfeldspathic: Wiktionary

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2. subfeldspathic: Encyclopedia

Definitions from Wiktionary (subfeldspathic) ▸ adjective:  Partially feldspathic. ▸ Words similar to subfeldspathic ▸ Usage examples for subfeldspathic ▸ Idioms related to subfeldspathic ▸ Wikipedia articles (New!) ▸ Popular nouns described by subfeldspathic ▸ Words that often appear near subfeldspathic ▸ Rhymes of subfeldspathic ▸ Invented words related to subfeldspathic