Definition of pyrite in English:

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Pronunciation: /ˈpīˌrīt/
(also pyrites /pəˈrītēz/ /pī-/)


A shiny yellow mineral consisting of iron disulfide and typically occurring as intersecting cubic crystals. Compare with marcasite. Also called fool's gold.
Example sentences
  • In terms of finance alone, last night was the difference between digging gold or iron pyrites.
  • The mordenite is associated with a hemispherical form of pale yellow calcite and cubic pyrite.
  • Many conclude that because pyrite is cubic, pyrrhotite must be hexagonal, as it often appears.



Pronunciation: /pīˈridik/
Pronunciation: /pəˈridik/
Example sentences
  • Its down-dip sulfide ores were sideritic and pyritic, with golden barite forming one of the gangue minerals.
  • The beds at this level are distinctly pyritic and the basal Psiloceras-bearing limestone is underlain by a 20 m thick black shale.
  • The mill produced a lead concentrate, a zinc concentrate, and pyritic tailings.


Pronunciation: /pəˌrītəˈzāSHən/ Pronunciation: /pī-/
Example sentences
  • The last stage of pyritization is represented by massive polycrystalline pyrite overgrowth, which encases certain axes.
  • A similar mechanism was inferred for the pyritization of the xylem elements of Gosslingia breconensis (of Lower Devonian age).
  • In rare examples there is evidence of fracturing of the axis after pyritization.


Pronunciation: /ˈpīrītˌīz/
Example sentences
  • Because the latter conditions were favorable for the formation of iron sulfides, the fossils were pyritized.
  • Pyrite is ubiquitous in marine sediments - so why are pyritised soft-bodied fossils so rare?
  • Many of the stelleroids are relatively complete, but flattened and pyritized, although preservation of some specimens is exquisite.


Pronunciation: /pəˈrītəs/ Pronunciation: /pī-/


Late Middle English (denoting a mineral used for kindling fire): via Latin from Greek puritēs 'of fire', from pur 'fire'.

For editors and proofreaders

Syllabification: py·rite

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