Retarder
Webster's Unabridged Dictionary:
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Re·tard·er
n.
1. One who, or that which, retards.
2. (Steam Boiler) Any of various devices, as a helix of flat metal strip, introduced into a boiler tube to increase the heating effect of the fire.
[Webster 1913 Suppl.]
3. (Photog.) A substance, as potassium bromide, added to a developer to retard its action.
[Webster 1913 Suppl.]
1. In paint, varnish, or lacquer, a high-boiling solvent used to lower evaporation rate of the volatile ingredients.
2. An admixture which delays the setting of cement paste or the setting of mixtures such as mortar or concrete containing cement.
3. An additive, mixed with plaster to control the rate of hardening.
Wikipedia on Answers.com:
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Retarder
Retarder can mean:
- Acrylic retarder, a chemical agent added to fine art acrylic paint to slow its short drying time
- Retarder (chemistry), a chemical agent that slows down a chemical reaction
- Retarder (mechanical engineering), a device for slowing down large trucks, lorries, buses, coaches and other vehicles
- Retarder (railroad), a device to slow railroad freight cars as they are sorted into trains
- Wave plate, an optical device that alters the polarization state of a light wave travelling through it
- Dough retarder, a refrigerator used to slow down the fermentation process of yeast when making dough
- Retarder (album), an album by The Unband
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McGraw-Hill Dictionary of Architecture & Construction
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc. All rights reserved.
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