[pahy-rahy-teez, puh-, pahy-rahyts] 
| 1. | pyrite. |
| 2. | marcasite. |
| 3. | any of various other metallic sulfides, as of copper or tin. |
[pahy-rahyt] | a very common brass-yellow mineral, iron disulfide, FeS2, with a metallic luster, burned to sulfur dioxide in the manufacture of sulfuric acid: chemically similar to marcasite, but crystallizing in the isometric system. |
tēs, n. use of adj.: of fire, so called because it produces sparks when struck. See pyr-, -ite 1 
[pahy-rit-ik, puh-] , py⋅rit⋅i⋅cal, py⋅ri⋅tous [puh-rahy-tuhs, pahy-] , adjective | py·ri·tes (pī-rī'tēz, pī'rīts') n. pl. pyrites Any of various natural metallic sulfide minerals, especially of iron. [Latin pyrītēs, from Greek purītēs (lithos), fire (stone), flint, from pūr, fire; see paəw  in Indo-European roots.] |
