a dark-green to black mineral of the amphibole group, calcium magnesium iron and hydroxyl aluminosilicate.
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
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]
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.
noun, Petrography. 1. a variety of schist containing needles of hornblende that lie in parallel planes.
[hawrn-boo k] /ˈhɔrnˌbʊk/ noun 1. a leaf or page containing the alphabet, religious materials, etc., covered with a sheet of transparent and fixed in a frame with a handle, formerly used in teaching children to read. 2. a primer or of rudiments. /ˈhɔːnˌbʊk/ noun 1. a page bearing a religious text or the alphabet, held […]
/ˈhɔːnbɪ/ noun 1. Nick. born 1958, British writer; his books include the memoir Fever Pitch (1992; filmed 1997) and the bestselling novels About a Boy (1998; filmed 2002),How To Be Good (2001), and Juliet, Naked (2009)
noun 1. a chair, especially of the late 19th-century U.S., having a frame made from steer, elk, buffalo, or other animal horns.