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Definition of Phonolite
1. n. A compact, feldspathic, igneous rock containing nephelite, haüynite, etc. Thin slabs give a ringing sound when struck; -- called also clinkstone.
Definition of Phonolite
1. Noun. (minerology) a light-coloured rock of volcanic origin composed mostly of alkali feldspars ¹
¹ Source: wiktionary.com
Definition of Phonolite
1. [n -S]
Medical Definition of Phonolite
1.