penninite

American

[pen-uh-nahyt] / ˈpɛn əˌnaɪt /

Also pennine

noun

Mineralogy.

a member of the chlorite group, rhombohedral in habit.

penninite British

/ ˈpɛnɪˌnaɪt /

noun

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

"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

Etymology

Origin of penninite

1865–70; < German Pennin (after the Pennine Alps ) + -ite ¹

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Crystals of penninite are found in serpentine at Zermatt in Switzerland and in the green schists of the Zillerthal in Tirol.

From Project Gutenberg

Well-developed crystals are met with only in the species clinochlore and penninite; those of the former are six-sided plates and are optically biaxial, whilst those of the latter have the form of acute rhombohedra and are usually optically uniaxial.

From Project Gutenberg

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023