penninite

[ pen-uh-nahyt ]
/ ˈpɛn əˌnaɪt /

noun Mineralogy.

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. 2020

British Dictionary definitions for penninite

penninite
/ (ˈpɛnɪˌnaɪt) /

noun

a bluish-green variety of chlorite occurring in the form of thick crystals

Word Origin for penninite

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