Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of phonolite is as below...

Clinkstone :: Clinkstone (n.) An igneous rock of feldspathic composition, lamellar in structure, and clinking under the hammer. See Phonolite..

Phonolite :: Phonolite (n.) A compact, feldspathic, igneous rock containing nephelite, hauynite, etc. Thin slabs give a ringing sound when struck; -- called also clinkstone..

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