pyrites

[pahy-rahy-teez, puh-, pahy-rahyts]

py·ri·tes

[pahy-rahy-teez, puh-, pahy-rahyts]
noun, plural py·ri·tes. Mineralogy.
3.
any of various other metallic sulfides, as of copper or tin.

Origin:
1545–55; < Latin pyrītes (plural); see pyrite

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Pyrites is always a great word to know.
So is callithumpian. Does it mean:
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.
Dictionary.com Unabridged

py·rite

[pahy-rahyt]
noun
a very common brass-yellow mineral, iron disulfide, FeS2, with a metallic luster, burned to sulfur dioxide in the manufacture of sulfuric acid: chemically similar to marcasite, but crystallizing in the isometric system.
Also, pyrites.
Also called iron pyrites.


Origin:
1560–70; < Latin pyrītēs < Greek pyrī́tēs, noun use of adj.: of fire, so called because it produces sparks when struck. See pyr-, -ite1

py·rit·ic [pahy-rit-ik, puh-] , py·rit·i·cal, py·ri·tous [puh-rahy-tuhs, pahy-] , adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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World English Dictionary
pyrites (paɪˈraɪtiːz, (in combination) ˈpaɪraɪts)
 
n , pl -tes
1.  another name for pyrite
2.  any of a number of other disulphides of metals, esp of copper and tin

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