noun Mineralogy.

a member of the chlorite group, rhombohedral in habit.

Also pen·nine [pen-in, -ahyn] /ˈpɛn ɪn, -aɪn/.

Origin of penninite

1865–70; < German Pennin (after the Pennine Alps) + -ite1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for pennines

Historical Examples of pennines

British Dictionary definitions for pennines


pl n

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)Also called: the Pennine Chain



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