from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A brass-colored mineral, FeS2, occurring widely and used as an iron ore and in producing sulfur dioxide for sulfuric acid. Also called fool's gold, iron pyrites.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The common mineral iron disulfide (FeS2), of a pale brass-yellow color and brilliant metallic luster, crystallizing in the isometric system.
- n. Any metallic-looking sulphide, such as the above, which is the most common.
- n. (usually as a plural: pyrites) Any metal dichalcogenide that is isostructural to the common mineral.
from the GNU version of the Collaborative International Dictionary of English
- n. A common mineral of a pale brass-yellow color and brilliant metallic luster, crystallizing in the isometric system; iron pyrites; iron disulphide.
from The Century Dictionary and Cyclopedia
- n. Native iron disulphid (FeS2), a very common mineral, occurring in isometric crystals, cubes, octahedrons, pyritohedrons, etc., and also, and more often, massive.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a common mineral (iron disulfide) that has a pale yellow color
Middle English perides, pirite, from Old French pirite, from Latin pyrītēs, flint; see pyrites.(American Heritage® Dictionary of the English Language, Fourth Edition)