phonolite(redirected from phonolitic)
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A light-colored volcanic rock composed largely of feldspars.
pho′no·lit′ic (-lĭt′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Geological Science) a fine-grained volcanic igneous rock consisting of alkaline feldspars and nepheline
[C19: via French from German Phonolith; see phono-, -lite]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a fine-grained volcanic rock composed chiefly of alkali feldspar and nepheline.
pho`no•lit′ic (-ˈɪt ɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.