Topic: GEOLOGY
| Date: | 1500-1600 |
| Language: | Latin |
| Origin: | 'flint', from Greek, 'of or in fire', from pyr; PYRE |
| |||||||||
py‧ri‧tes
[uncountable]
[uncountable]HEG a mix of sulphur with a type of metal, usually iron, or iron and copper [↪ fool's gold]:
iron pyrites
iron pyrites

