[ hawrn-blend ]
/ ˈhɔrnˌblɛnd /


a dark-green to black mineral of the amphibole group, calcium magnesium iron and hydroxyl aluminosilicate.

Nearby words

  1. horn-rims,
  2. horn-spread,
  3. hornbag,
  4. hornbeam,
  5. hornbill,
  6. hornblende schist,
  7. hornbook,
  8. hornby,
  9. horndog,
  10. horne

Origin of hornblende

From German, dating back to 1760–70; see origin at horn, blende

Related formshorn·blen·dic, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for hornblende

British Dictionary definitions for hornblende


/ (ˈhɔːnˌblɛnd) /


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) 5 Si 6 (Si,Al) 2 O 22 (OH) 2
Derived Formshornblendic, adjective

Word Origin for hornblende

C18: from German Horn horn + blende

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for hornblende



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

Science definitions for hornblende


[ hôrnblĕnd′ ]

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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.