Definition of phonolite in English:

Share this entry


Pronunciation: /ˈfəʊnəlʌɪt/


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


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

For editors and proofreaders

Line breaks: phono|lite

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.