retarder
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(ri ′tärd·ər)
(materials) A material that inhibits the action of another substance, such as flameproofing agents or substances added to cement to retard setting time. Also known as retardant.
(mechanical engineering) A braking device used to control the speed of railroad cars moving along the classification tracks in a hump yard. A strip inserted in a tube of a fire-tube boiler to increase agitation of the hot gases flowing therein.
Mosby's Dental Dictionary:
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retarder
n
A chemical added to a substance to slow a chemical reaction, prolong the set of the material, and provide more working time.
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McGraw-Hill Science & Technology Dictionary
McGraw-Hill Dictionary of Scientific and Technical Terms. Copyright © 2003, 1994, 1989, 1984, 1978, 1976, 1974 by McGraw-Hill Companies, Inc. All rights reserved.
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