Origin of pyriteClassical Latin pyrites ; from Classical Greek pyrit?s, flint or millstone ; from pyrit?s (lithos), fire (stone) ; from pyr, fire
Origin of pyriteMiddle English perides, pirite, from Old French pirite, from Latin pyr&imacron;t&emacron;s, flint; see pyrites.
- py·rit′ic , py·rit′i·cal
- (mineralogy) The common mineral iron disulfide (FeS2), of a pale brass-yellow color and brilliant metallic luster, crystallizing in the isometric system.
- (usually as a plural: pyrites) Any metallic-looking sulphide, such as the above, which is the most common.
- (solid state chemistry) (usually as a plural: pyrites) Any metal dichalcogenide that is isostructural to the common mineral.
- Copper diselenide can occur both as a marcasite and a pyrite.
recorded since 1555, from Old French (=modern) pyrite (12c.), from Latin pyrites, from Ancient Greek πυρίτης λιθός (pyrites lithos) "stone of fire, flint" (so called because it glitters), notably the first part: adjective πυρίτης (puritēs, “of or in fire”), from πῦρ (pur, “fire”)