pyritical


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py·rite

 (pī′rīt′)
n.
A brass-colored mineral, FeS2, occurring widely and used as an iron ore and in producing sulfur dioxide for sulfuric acid. Also called fool's gold, iron pyrites.

[Middle English perides, pirite, from Old French pirite, from Latin pyrītēs, flint; see pyrites.]

py·rit′ic (-rĭt′ĭk), py·rit′i·cal (-ĭ-kəl) adj.

pyritical

(paɪˈrɪtɪkəl)
adj
(Minerals) mineralogy relating to pyrites