noun Mineralogy.
a member of the chlorite group, rhombohedral in habit.
Also, pennine [pen-in, -ahyn] .

1865–70; < German Pennin (after the Pennine Alps) + -ite1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
Pennines (ˈpɛnaɪnz)
pl n
Also called: the Pennine Chain a system of hills in England, extending from the Cheviot Hills in the north to the River Trent in the south: forms the watershed for the main rivers of N England. Highest peak: Cross Fell, 893 m (2930 ft)

penninite (ˈpɛnɪˌnaɪt)
a bluish-green variety of chlorite occurring in the form of thick crystals
[C20: from German Pennin Pennine (Alps) + -ite1]

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