andesite

an·de·site

 (ăn′dĭ-zīt′)

n.

A gray, fine-grained volcanic rock consisting chiefly of plagioclase feldspar and one or more mafic minerals.

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[After the Andes.]

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.

andesite

(ˈændɪˌzaɪt) or

andesyte

n

(Geological Science) a fine-grained tan or grey volcanic rock consisting of plagioclase feldspar, esp andesine, amphibole, and pyroxene

[C19: from Andes + -ite¹]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

an•des•ite

(ˈæn dəˌzaɪt)

n.

a dark volcanic rock composed essentially of plagioclase feldspar and one or more mafic minerals.

[1840–50; after the Andes; see -ite¹]

an`de•sit′ic (-ˈzɪt ɪk) adj.

Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

andesite

A dark, fine-grained rock, taking its name from the Andes Mountains.

Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited

Thesaurus

Noun

1.

andesite - a dark grey volcanic rock     igneous rock - rock formed by the solidification of molten magma

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