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pyritohedron

[ pahy-rahy-tuh-hee-druhn, puh-, pahy-rahy- ]

noun

, Crystallography.
  1. a crystal form of 12 pentagonal faces.

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Other Words From

  • py·rito·hedral adjective

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Word History and Origins

Origin of pyritohedron1

1865–70; pyrito- (combining form of pyrite ) + -hedron

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