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phonolite

Pronunciation: /ˈfəʊnəlʌɪt/
Definition of phonolite

noun

[mass noun] Geology
  • a fine-grained volcanic igneous rock composed of alkali feldspars and nepheline.

Origin:

early 19th century: from phono- 'relating to sound' (because of its resonance when struck) + -ite1

phonolite in other Oxford dictionaries

Definition of phonolite in the US English dictionary
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