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 pyrītēs 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”)