gypsum

(redirected from Calcium sulfate dihydrate)
Also found in: Thesaurus, Medical, Encyclopedia.
Related to Calcium sulfate dihydrate: magnesium sulfate heptahydrate

gyp·sum

 (jĭp′səm)
n.
A widespread colorless, white, or yellowish mineral, CaSO4·2H2O, used in the manufacture of plaster of Paris, various plaster products, and fertilizers.

[Middle English gipsum, from Latin gypsum, from Greek gupsos, probably of Semitic origin; akin to Arabic jibs, jiṣṣ, jaṣṣ, from Akkadian gaṣṣu.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

gypsum

(ˈdʒɪpsəm)
n
(Minerals) a colourless or white mineral sometimes tinted by impurities, found in beds as an evaporite. It is used in the manufacture of plaster of Paris, cement, paint, school chalk, glass, and fertilizer. Composition: hydrated calcium sulphate. Formula: CaSO4.2H2O. Crystal structure: monoclinic
[C17: from Latin, from Greek gupsos chalk, plaster, cement, of Semitic origin]
gypseous adj
gypsiferous adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

gyp•sum

(ˈdʒɪp səm)

n.
a soft mineral, hydrous calcium sulfate, CaSO4∙2H2O, occurring in massive or fibrous form and also as alabaster and selenite: used to make plaster of Paris and as a fertilizer.
[1640–50; < Latin < Greek gýpsos chalk, gypsum]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

gyp·sum

(jĭp′səm)
A colorless, white, or pinkish mineral consisting of calcium sulfate. Gypsum occurs as individual blade-shaped crystals or as massive beds in sedimentary rocks. It is used in manufacturing plasterboard, cement, and fertilizers. It is the mineral used to represent a hardness of 2 on the Mohs scale.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

gypsum

- From Semitic, a relative or ancestor of Arabic jibs and Hebrew gephes, "plaster."
See also related terms for plaster.
Farlex Trivia Dictionary. © 2012 Farlex, Inc. All rights reserved.

gypsum

A mineral or rock composed of calcium sulfate and water.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.gypsum - a common white or colorless mineral (hydrated calcium sulphate) used to make cements and plasters (especially plaster of Paris)gypsum - a common white or colorless mineral (hydrated calcium sulphate) used to make cements and plasters (especially plaster of Paris)
atomic number 20, Ca, calcium - a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
alabaster - a compact fine-textured, usually white gypsum used for carving
gesso - gypsum or plaster of Paris spread on a surface to make it suitable for painting or gilding (or a surface so prepared)
terra alba - finely pulverized gypsum used especially as a pigment
calcium sulfate, calcium sulphate - a white salt (CaSO4)
plaster of Paris, plaster - any of several gypsum cements; a white powder (a form of calcium sulphate) that forms a paste when mixed with water and hardens into a solid; used in making molds and sculptures and casts for broken limbs
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
sádrovec
kips
gipsita

gypsum

[ˈdʒɪpsəm] Nyeso m
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

gypsum

[ˈdʒɪpsəm] ngypse m
Collins English/French Electronic Resource. © HarperCollins Publishers 2005

gypsum

nGips m
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
References in periodicals archive ?
Second, the pyrite in the tailings is decomposed, and [Fe.sub.2][O.sub.3] and sulphuric acid are generated under the joint action of water and oxygen, in which the sulfate radical reacts with the hydration products of cement calcium hydroxide of cement and produce calcium sulfate dihydrate [20].
Ceramics such as calcium sulfate hemihydrate (plaster of Paris), silicate-based glasses, and calcium sulfate dihydrate (gypsum), and calcium phosphates are used for producing implant devices and bone graft.
In the composites with concrete breakage there is a formation of extensive ordered structures having a dense package of tumors with fine-crystalline structure ([less than or equal to]0.01 mcm) of priori calcium-hydrosilicates, hydroaluminates and calcium sulfate dihydrate as a result of hardening of portland-cement and hemihydrate gypsum.