plural -s
: a mineral Bi2Te2S consisting of a telluride and sulfide of bismuth, sometimes containing selenium, being pale steel gray in color and of a metallic luster, and occurring usually in foliated masses (hardness 1.5–2, specific gravity 7.2–7.6)

Word History


Late Greek tetradymos fourfold, from Greek tetra- + didymos twin; from its occurrence in compound twin crystals

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Dictionary Entries Near tetradymite

Cite this Entry

“Tetradymite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tetradymite. Accessed 14 Jun. 2024.

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