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Recorded since 1555, from Old Frenchpyrite (12th century), from Latinpȳritēs, from Ancient Greekπυρίτηςλίθος(purítēs líthos, “stone of fire, flint”) (so called because it glitters), notably the first part: adjective πυρίτης(purítēs, “of or in fire”), from πῦρ(pûr, “fire”). Analyzable as pyr- + -ite
(mineralogy) The common mineralirondisulfide (FeS2), of a pale brass-yellow color and brilliant metallic luster, crystallizing in the isometric system.
(usually as a plural: pyrites) Any metallic-looking sulphide, such as the above, which is the most common.
