Pyrites definitions

pī-rī'tēz, pī'rīts'
Any of various natural metallic sulfide minerals, especially of iron.
noun
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Any of various native metallic sulfides, esp. iron pyrites.
noun
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Plural form of pyrite.
noun
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Origin of pyrites

Latin pyrītēs from Greek purītēs (lithos) fire (stone), flint from pūr fire paəwr̥ in Indo-European roots