Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Any of various natural metallic sulfide minerals, especially of iron.
from The Century Dictionary.
- noun Either of the common sulphids of iron, pyrite and marcasite, but also the yellow sulphid of copper and iron, chalcopyrite: the former are called distinctively iron pyrites, while the latter is known as copper pyrites.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) A name given to a number of metallic minerals, sulphides of iron, copper, cobalt, nickel, and tin, of a white or yellowish color.
- noun arsenopyrite.
- noun See under
Auriferous . - noun millerite.
- noun isometric iron disulphide; pyrite.
- noun millerite.
- noun See
Pyrite . - noun pyrrhotite.
- noun stannite.
- noun orthorhombic iron disulphide; marcasite. This includes cockscomb pyrites (a variety of marcasite, named in allusion to its form), spear pyrites, etc.
- noun the sulphide of copper and iron; chalcopyrite.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Plural form of
pyrite .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun any of various metallic-looking sulfides (of which pyrite is the commonest)
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
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Examples
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_Copperas: _ (Sulphate of iron or green vitriol,) a bright green mineral substance, formed by the decomposition of a peculiar ore of iron called pyrites, which is a sulphuret of iron.
American Woman's Home Harriet Beecher Stowe 1853
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_Copperas_, (sulphate of iron, or green vitriol,) a bright green mineral substance, formed by the decomposition of a peculiar ore of iron, called pyrites, which is a sulphuret of iron.
A Treatise on Domestic Economy For the Use of Young Ladies at Home and at School Catharine Esther Beecher 1839
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This is especially important if fuel or clay contain sulphur compounds such as pyrites which are transformed into sulphuric acid in the kiln gases.
Chapter 10 1984
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The changes which take place in stored coal are of two kinds: 1st, the oxidization of the inorganic matter such as pyrites; and 2nd, the direct oxidization of the organic matter of the actual coal.
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Mr. TALJAARD wished to know if the words 'pyrites' and 'concentrates' could not be translated into the Dutch language.
The Transvaal from Within A Private Record of Public Affairs 1896
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'Mr. Taljaard wished to know if the words "pyrites" and "concentrates" could not be translated into the Dutch language.
The War in South Africa Its Cause and Conduct Arthur Conan Doyle 1894
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Substances which lose sulphur on heating (such as pyrites) are thus treated: -- Weigh up 1 gram, and evaporate nearly to dryness with 10 c.c. each of nitric and hydrochloric acids.
A Text-book of Assaying: For the Use of Those Connected with Mines. Cornelius Beringer 1886
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This material is derived, by the process of weathering, from the iron pyrites which is disseminated, in great abundance, and in a state of extreme comminution, through the slates, many of which, being feldsphatic, yield also alum.
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This substance is no doubt in certain cases an astringent salt, formed in those marls which contain iron pyrites which is prone to decompose on exposure to those bodies which contain oxygen, the sulphur thereby is oxidated, and slowly acts upon the iron and forms copperas, or upon alumina, which is present in the marl.
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This material is derived by the process of weathering, from the iron pyrites, which is disseminated in great abundance, and in a state of extreme comminution through the slates, many of which, being feldspathic, also yield alum. "
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