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tetradymite

American  
[te-trad-uh-mahyt] / tɛˈtræd əˌmaɪt /

noun

  1. a mineral, bismuth telluride and sulfide, Bi 2 Te 2 S, occurring in soft-gray to black foliated masses.

tetradymite British  
/ tɛˈtrædɪˌmaɪt /

noun

  1. a grey metallic mineral consisting of a telluride and sulphide of bismuth. Formula: Bi 2 Te 2 S

"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 tetradymite

1840–50; < Greek tetrádym ( os ) fourfold ( see tetra-, didymous) + -ite 1; modeled on German Tetradymit

Example Sentences

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It is also found in some comparatively rare minerals, such as tetradymite, combined with tellurium, and associated with gold.

From A Text-book of Assaying: For the Use of Those Connected with Mines. by Beringer, Cornelius

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.