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Dictionary Language resources

tonalite

Pronunciation: /ˈtɒn(ə)lʌɪt/

Definition of tonalite

noun

[mass noun] Geology

a coarse-grained plutonic rock consisting chiefly of sodic plagioclase, quartz, and hornblende or other mafic minerals: fields of tonalite [count noun]:the margins are invaded by mantle-derived tonalites