argentite

[ahr-juh n-tahyt]
noun
  1. a dark lead-gray sectile mineral, silver sulfide, Ag2S, occurring in crystals and as formless aggregates: an important ore of silver.

Origin of argentite

First recorded in 1830–40; argent- + -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for argentite

argentite

noun
  1. a dark grey mineral that consists of silver sulphide, usually in cubic crystalline forms, and occurs in veins, often with native silver. It is found esp in Mexico, Nevada, and Saxony and is an important source of silver. Formula: Ag 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