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phonolite

[fohn-l-ahyt] /ˈfoʊn lˌaɪt/
noun
1.
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
1820-1830
1820-30; < French < German Phonolith. See phono-, -lite
Related forms
phonolitic
[fohn-l-it-ik] /ˌfoʊn lˈɪt ɪk/ (Show IPA),
adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for phonolitic

phonolite

/ˈfəʊnəˌlaɪt/
noun
1.
a fine-grained volcanic igneous rock consisting of alkaline feldspars and nepheline
Derived Forms
phonolitic (ˌfəʊnəˈlɪtɪk) adjective
Word Origin
C19: via French from German Phonolith; see phono-,-lite
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for phonolitic

phonolite

n.

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
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Encyclopedia Article for phonolitic

phonolite

any member of a group of extrusive igneous rocks (lavas) that are rich in nepheline and potash feldspar. The typical phonolite is a fine-grained, compact igneous rock that splits into thin, tough plates which make a ringing sound when struck by a hammer, hence the rock's name.

Learn more about phonolite with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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