Definition of phonolite in English:

phonolite

Syllabification: pho·no·lite
Pronunciation: /ˈfōnəˌlīt
 
/

noun

Geology
  • A fine-grained volcanic rock composed of alkali feldspars and nepheline.
    More example sentences
    • South of the city of Isparta pyroclastic rocks are interbedded with rhyolite, trachyte, phonolite and lamproite flows (the Golcuk and Bucak Volcanics of Savascin et al.).
    • In the Canaries, the lavas are much more compositionally varied in each of these stages, ranging from tholeiitic basalts to phonolites and trachytes.
    • The dominant magma types are basalts and hawaiites, with lesser amounts of trachytes, quartz trachytes, alkali rhyolites and phonolites.

Origin

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

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