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hornblende

[hawrn-blend] /ˈhɔrnˌblɛnd/
noun
1.
a dark-green to black mineral of the amphibole group, calcium magnesium iron and hydroxyl aluminosilicate.
Origin
1760-1770
1760-70; < German; see horn, blende
Related forms
hornblendic, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for horn blende

hornblende

/ˈhɔːnˌblɛnd/
noun
1.
a black or greenish-black mineral of the amphibole group, found in igneous and metamorphic rocks. Composition: calcium magnesium iron sodium aluminium aluminosilicate. General formula: (Ca,Na)2.3(Mg,Fe,Al)5Si6(Si,Al)2O22(OH)2
Derived Forms
hornblendic, adjective
Word Origin
C18: from German Horn horn + blende
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 horn blende

hornblende

n.

1796, from German Hornblende, from horn (see horn (n.)) + blende (see blende).

The term "Hornblende" is an old German name for any dark, prismatic crystal found with metallic ores but containing no valuable metal (the word "Blende" indicates "a deceiver") [Herbert Bucksch, "Dictionary Geotechnical Engineering," 1995]

Online Etymology Dictionary, © 2010 Douglas Harper
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horn blende in Science
hornblende
  (hôrn'blěnd')   
A common, green to black mineral of the amphibole group. It has a variable composition and occurs in monoclinic crystals with a hexagonal cross-section, in fibrous forms, or in granular forms. Hornblende is found in many metamorphic and igneous rocks. Chemical formula: (Ca,Na)2-3(Mg,Fe,Al)5(Al,Si)8O22(OH)22.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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