phonolite

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noun pho·no·lite \ˈfō-nə-ˌlīt\

Definition of phonolite

  1. :  a gray or green volcanic rock consisting essentially of orthoclase and nepheline

Origin and Etymology of phonolite

French, from German Phonolith, from phon- + -lith; from its ringing sound when struck


First Known Use: 1831


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