tetradymite

[ te-trad-uh-mahyt ]

/ tɛˈtræd əˌmaɪt /

noun

a mineral, bismuth telluride and sulfide, Bi2Te2S, occurring in soft-gray to black foliated masses.

Nearby words

tetracyn, tetrad, tetradactyl, tetradactylous, tetradrachma, tetradymite, tetradynamous, tetraethyl, tetraethyl lead, tetraethyl pyrophosphate, tetraethyllead

Origin of tetradymite

1840–50; < Greek tetrádym(os) fourfold (see tetra-, didymous) + -ite¹; modeled on German Tetradymit

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for tetradymite

It is also found in some comparatively rare minerals, such as tetradymite, combined with tellurium, and associated with gold.
A Textbook of Assaying: For the Use of Those Connected with Mines.|Cornelius Beringer and John Jacob Beringer

British Dictionary definitions for tetradymite

tetradymite

/ (tɛˈtrædɪˌmaɪt) /

noun

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

Word Origin for tetradymite

C19: from Late Greek tetradumos fourfold, from Greek tetra- + didumos double

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