hornblende noun. ['hɔ:nblɛnd] L18.
[German, from Horn HORN noun + BLENDE.]
Mineralogy. A dark green or brown, monoclinic, basic aluminosilicate of calcium, sodium, magnesium, and iron, which is a mineral of the amphibole group and is a common constituent of igneous and metamorphic rocks, the crystals usu. being columnar prisms.

■ horn'blendic adjective E19.

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