Longman Dictionary of Contemporary English homepage

Topic: GEOLOGY

Date: 1500-1600
Language: Latin
Origin: 'flint', from Greek, 'of or in fire', from pyr; PYRE

pyrites

noun
     
pyrites
py‧ri‧tes [uncountable]
HEG a mix of sulphur with a type of metal, usually iron, or iron and copper [↪ fool's gold]:
iron pyrites
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