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polianite

American  
[poh-lee-uh-nahyt] / ˈpoʊ li əˌnaɪt /

noun

Mineralogy.

  1. a variety of pyrolusite, MnO 2 , having well-developed crystals.

Etymology

Origin of polianite

1840–50; < German Polianit, irregular < Greek poliaínesthai to grow white (with sea foam), derivative of poliós gray; -ite 1

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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.