Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A green to black amphibolic mineral, CaNa(Mg,Fe)4(Al,Fe,Ti)3Si6O22(OH,F)2, formed in the late stages of cooling in igneous rock.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A green to black amphibole mineral, of complex structure, formed in the late stages of cooling in igneous rock.

from the GNU version of the Collaborative International Dictionary of English

  • n. The common black, or dark green or brown, variety of amphibole. (See amphibole.) It belongs to the aluminous division of the species, and is also characterized by its containing considerable iron. Also used as a general term to include the whole species.

from The Century Dictionary and Cyclopedia

  • n. A common mineral, crystallizing in the monoclinic system with a prismatic angle of 124½°.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a green to black mineral of the amphibole group; consists of silicates of calcium and sodium and magnesium and iron

Etymologies

German : Horn, horn (from Middle High German, from Old High German) + Blende, blende; see blende.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From German Hornblende, from Horn ("horn") + Blende (see blende). (Wiktionary)

Examples

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