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penninite

[pen-uh-nahyt]
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noun Mineralogy.
  1. a member of the chlorite group, rhombohedral in habit.
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Also pen·nine [pen-in, -ahyn] /ˈpɛn ɪn, -aɪn/.

Origin of penninite

1865–70; < German Pennin (after the Pennine Alps) + -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for penninite

penninite

noun
  1. a bluish-green variety of chlorite occurring in the form of thick crystals
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Word Origin

C20: from German Pennin Pennine (Alps) + -ite 1
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