a fine-grained volcanic rock composed chiefly of alkali feldspar and nepheline, some varieties of which split into pieces that ring on being struck.
Origin of phonolite
1820–30;Related formspho·no·lit·ic [fohn-l-it-ik] /ˌfoʊn lˈɪt ɪk/, adjective
< German Phonolith.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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Derived Formsphonolitic (ˌfəʊnəˈlɪtɪk), adjective
a fine-grained volcanic igneous rock consisting of alkaline feldspars and nepheline
Word Origin for phonolite
C19: via French from German Phonolith; see phono-, -lite
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for phonolite
a kind of volcanic rock that rings when struck, c.1830, literally "sounding stone," from phono- + -lite. Based on German klingstein.
Online Etymology Dictionary, © 2010 Douglas Harper