acanthite

a·can·thite

[uh-kan-thahyt]
noun Mineralogy.
the orthorhombic form of silver sulfide.
Compare argentite.


Origin:
acanth- + -ite1

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Encyclopedia Britannica
Encyclopedia

acanthite

a silver sulfide mineral (Ag2S) that is the most important ore of silver. It is abundant, with other silver minerals, in the sulfide mineral deposits of Kongsberg, Nor.; Kremnica, Slovakia; Zacatecas, Mex.; and the Comstock Lode, Nev., U.S

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Acanthite is always a great word to know.
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an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
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